JPH02109099A - Automatic accompanying device - Google Patents

Abstract

PURPOSE:To allow the accompanying device to execute an expected automatic accompaniment by constituting said device so that an automatic chord progress control means designates successively a classification of a chord sound and a musical interval of a bass sound by interlocking with a read-out operation of a special rhythm pattern selected by a rhythm pattern control means. CONSTITUTION:Whenever a special rhythm pattern selected by a rhythm switch is read out of a rhythm pattern memory at the time of an automatic accompaniment, an automatic chord progress control means switches alternately and reads out regular chord progress data and special chord progress data from a chord progress memory by interlocking with its operation, and based on the chord progress data which is read out, a classification of a chord sound pronounced by a chord pattern and a musical interval pronounced by a bass pattern are designated successively. In such a way, an automatic accompaniment by a bass/chord accompaniment expected by a performer can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic accompaniment device for an electronic musical instrument, and more particularly to an automatic accompaniment device that specifies a chord progression and performs bass chord accompaniment.

[Prior art] With the introduction of electronic musical instruments such as electronic keyboards, electronic wind instruments, and electronic stringed instruments, it has become possible to easily enjoy playing with a variety of musical tones, and it has become possible to enjoy playing with a variety of musical tones. It is becoming easier to obtain many types of musical tones.

Furthermore, in order to provide general users with a wide variety of performance effects with simple operations, many electronic musical instruments equipped with automatic accompaniment devices have been developed.

In this case, automatic accompaniment can be performed using rhythm instrument sounds, bass and chord accompaniment, etc., which enhance musical expressiveness.

Here, in an automatic accompaniment device that performs automatic accompaniment by combining automatic accompaniment using rhythm instrument sounds and automatic accompaniment using bass chord accompaniment, the timing at which the rhythm sounds are generated is, for example, 16 steps (corresponding to a 16th note). Patterns to be paired (hereinafter referred to as rhythm patterns)
specified by. In other words, specify whether or not to generate a rhythm sound for every l step, read out the 16-step rhythm pattern sequentially at a constant tempo, and determine and control whether or not to generate a rhythm sound for each step. By controlling the sound generation timing and playing the sound while repeatedly reading out the above 16 steps, a musically rhythmic accompaniment effect can be obtained. Note that a plurality of rhythm sounds may be prepared, and in this case, the above control is performed independently for the plurality of rhythm sounds. Furthermore, the timing at which the chord tones are sounded is similarly specified by a pattern (hereinafter referred to as a chord pattern) consisting of, for example, 16 steps, which is independent of the rhythm pattern, and the timing at which the chord tones are sounded is controlled. That's fine.

Furthermore, the timing at which the bass sound is produced is also independent of the rhythm pattern and chord pattern, for example, 16.
The sound generation timing of the bass sound may be controlled based on a pattern having one set of steps (hereinafter referred to as a base pattern).

At this time, the performer determines how to specify the chord progression of the chord tones that are sounded in the above chord pattern, that is, how to specify the chord type according to the progression of the song. This is performed at any time using a chord progression (called an accompaniment key), or the performer stores a chord progression in advance in a predetermined chord memory and performs automatic accompaniment based on it.

Note that the specification of the bass progression of the bass notes sounded in the bass pattern, that is, how to specify the bass pitch according to the progression of the song, usually depends on the root of the chord type specified in each chord progression. Specify as the pitch of the sound.

[Problem to be solved by the invention]

However, in the conventional example described above, the bass pitch and chord type do not progress unless the performer specifies the chord progression. In this case, especially for beginners, it is very difficult to specify chords one after another using the accompaniment keys during automatic accompaniment, and there is a problem that the desired automatic accompaniment effect cannot be obtained.

Also, even if you store the chord progression in memory in advance,
Beginners have a problem in that they do not know what chord types to specify and in what order, and as a result, they are unable to obtain the desired automatic accompaniment effect.

The object of the present invention is to enable even beginners to easily specify chord progressions, thereby enabling automatic accompaniment with bass chord accompaniment as expected by the performer, and furthermore, in this case, a variety of chord progressions can be specified using NW technology. The goal is to make it possible to achieve this through simple operations.

[Means to solve the problem]

The present invention is based on an automatic accompaniment device that generates rhythm tones based on a predetermined rhythm pattern and generates bass and chord tones based on predetermined bass patterns and chord patterns to perform automatic accompaniment. Here, the rhythm pattern is a pattern including, for example, a set of 16 steps (corresponding to 16th notes) for specifying the timing at which rhythm sounds are to be produced. Then, in the rhythm pattern, it is specified whether or not to generate a rhythm sound for each step, and this 16-step rhythm pattern is sequentially read out at a constant tempo, and it is determined and controlled whether or not to generate a sound for each step. Similarly, the chord pattern is a rhythm pattern that controls the timing at which the chord sound is sounded and performs automatic accompaniment using rhythm sounds while repeatedly reading out the above 16 steps. This is a pattern consisting of a set of, for example, 16 steps, which is independent from the above, and based on this pattern, the sounding timing of the chord sound is controlled.

Furthermore, the bass pattern is also a pattern that is independent of the rhythm pattern and chord pattern and is made up of a set of 16 steps, for example, to specify the timing at which the bass sound is produced, and based on this pattern, the timing at which the bass sound is produced is determined. control.

In the automatic accompaniment device described above, first, the pattern storage means is a means for storing a normal rhythm pattern and at least one type of special rhythm pattern.

Here, the normal rhythm pattern is, for example, a main rhythm pattern, and the special rhythm pattern is, for example, a fill-in rhythm pattern or an intro rhythm pattern.

The chord progression storage means is a means for storing normal chord progression data and at least one type of special chord progression data. In this case, each chord progression data includes, for example, scale data that specifies the scale, chord name data that specifies the chord name, and tone length data that specifies the length at which the chord type determined by the scale data and chord name data is to be sounded. It consists of multiple sets of date strings consisting of and. Further, the normal chord progression data is, for example, main chord progression data, and the special chord progression data is, for example, fill-in chord progression data or intro chord progression data.

Next, it has selection means for selecting each of the special rhythm patterns. The means is, for example, a fill-in switch or an intro switch.

Further, the rhythm pattern control means sequentially reads out the normal rhythm pattern, for example, the main rhythm pattern, from the pattern storage means during automatic accompaniment, and when the selection means performs a selection operation, the corresponding special rhythm pattern, for example, is read out from the pattern storage means in normal times. Fill-in rhythm pattern or intro rhythm pattern! It is a means for sequentially reading and controlling the sound generation timing of the rhythm sound based on the read rhythm pattern. The means may select, for example, one of the rhythm patterns stored in the rhythm pattern storage means.
This means reads out one step at a time from those corresponding to the selection operation by the selection means, and controls the sound generation if sound generation is instructed for each step.

Further, the automatic chord progression control means is configured to combine the chord progression data read from the chord progression storage means with the normal chord progression data in conjunction with the reading operation of the special rhythm pattern every time the reading operation of the special rhythm pattern is performed during automatic accompaniment. Special chord progression data is alternately switched and sequentially read out, and based on the read chord progression data, the type of chord sound to be sounded by the chord pattern is specified and the bass sound to be sounded by the bass pattern is specified. This is a means of sequentially specifying pitches. The means selects, for example, from among the chord progression data stored in the chord progression storage means, chord progression data to be switched and to be sounded from now on.
This is means for reading out one set at a time and specifying for each set the type of chord sound determined by the scale data and chord name data and the pitch of the bass sound determined by the scale data by the length determined by the tone length data.

[For production]

The effects of the present invention are as follows.

First, for example, the normal rhythm pattern is a wooden tin pattern, the special rhythm pattern is a fill-in rhythm pattern, the normal chord progression data is main chord progression data, and the special chord progression data is fill-in chord progression data. , when the selection means is a fill-in switch, the rhythm pattern control means changes to the readout operation of the fill-in rhythm pattern when the fill-in switch is pressed during the readout operation of the main rhythm pattern, and the rhythm pattern control means changes to the readout operation of the fill-in rhythm pattern, After reading the fill-in rhythm pattern, the process returns to the reading operation of the main rhythm pattern. On the other hand, the automatic chord progression control means changes the operation to read out the fill-in chord progression data after the rhythm pattern control means finishes the readout operation of the fill-in rhythm pattern during the readout operation of the main chord progression data. After the read operation of the fill-in rhythm pattern is completed by the rhythm pattern control means during the read operation of the fill-in chord progression data, the operation returns to the read operation of the main chord progression data.

Next, for example, the normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is an intro rhythm pattern and a fill-in rhythm pattern, the normal chord progression data is main chord progression data, and the special chord progression data is intro chord progression data. and when the selection means is an intro switch and a fill-in switch,
The rhythm pattern control means starts reading out the intro rhythm pattern to start automatic accompaniment when the intro switch is pressed, and after reading the intro rhythm pattern of a predetermined length, starts the automatic accompaniment. Shift to rhythm pattern readout operation. Furthermore, when the fill-in switch is pressed during the reading operation of the basic rhythm pattern, the operation is changed to the reading operation of the fill-in rhythm pattern, and after reading the fill-in rhythm pattern of a predetermined length, the main rhythm pattern is read out. Return to read operation. On the other hand, the automatic chord progression control means starts reading out the intro chord progression data at the same time as the rhythm pattern control means starts reading out the intro rhythm pattern at the start of automatic accompaniment. After the rhythm pattern control means completes the read operation of the fill-in rhythm pattern during the read operation of the chord progression data, the operation shifts to the read operation of the main chord progression data.

Here, the base pattern and chord pattern are also 1
In addition to different types, a normal pattern and at least one special pattern may be prepared for each pattern, and the patterns may change in synchronization with the rhythm pattern.

As mentioned above, all difficult bass chord progressions are performed automatically, and the performer can switch from a normal chord progression to a special chord progression with a simple switch operation, making it easy to create a variety of chord progressions. It becomes possible to specify. Furthermore, in this case, each time the rhythm pattern becomes a special rhythm pattern, the chord progression data is alternately switched in conjunction with the special rhythm pattern, and the way in which the chord progression data is linked is controlled so that the accompaniment is musically effective. This allows even beginners to easily enjoy advanced automatic accompaniment.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

(tip trip and bottom) FIG. 1 is a configuration diagram of an embodiment of the present invention.

A central control unit Z (CPU, hereinafter the same) 1 is a control unit that controls the overall operation, and has a flag counter register group (FCR1 and below) 1011 therein.

The CPUl0I includes a keyboard section 104, a switch section 105,
pattern memory section 106, chord progression memory section 107,
Code judge section 10B and timer clock generator 1
02 is connected. Also, the timer clock generator 10
A rhythm counter 103 (same for RC1 and below) that counts up by +1 based on the timer clock from RC2 is connected. The CPUl0I includes a melody sound generation section 109, an accompaniment sound generation section 110, and a rhythm sound generation section 11.
1 to emit musical tones via the sound system 112.

As illustrated in the accompaniment sound generation section 110, the melody sound generation section 109, accompaniment sound generation section 110, and rhythm sound generation section 111, for example, determine the pitch and basic waveform of the generated musical tone.
CO (Digital controlled Osci
llator) 1101 and envelope generation 81102 that determines temporal changes in its characteristics, DCOllo
D CW (
(Digital Controlled Wave)
1103, an envelope generator 1104 that determines temporal changes in its timbre characteristics, and a DC CA (Dtg) that controls the volume of the output waveform of the DCW 1103.
italControlled Amplifier)
1105, an envelope generator 1106, etc. that determines temporal changes in the volume characteristics, and by changing parameters given to the envelope generators 1102, 1104, 1106, etc., various musical sound waveforms can be generated. Note that the configuration is not limited to the above configuration, and for example, the rhythm sound generation unit 111 stores the musical sound waveform of an actual rhythm instrument in a memory, and reads and outputs it in synchronization with a rhythm pattern to be described later. A PCM sound source type configuration may also be used.

The sound system 112 includes a melody sound generator 109,
It is a means for amplifying musical sound waveforms output from the accompaniment sound generating section 110 and the rhythm sound generating section 111 and emitting the sound, and is, for example, an amplifier, a speaker, or the like.

FIG. 2 shows the appearance of the keyboard section 104 shown in FIG. 1.

As shown in the figure, it is composed of a plurality of keys 1041, and in this embodiment, it generates a scale for one five octave from C2 of the 0 octave (OC=O) to 01 of the 5 octave (OC=5). can. Among these, accompaniment key 1 from 02 to B3
042 functions as a key for specifying a normal scale during normal performance, but functions as a key for specifying a chord in a normal mode during automatic accompaniment, which will be described later.

Also, adjacent to the keyboard section 104, the switch section 1 of FIG.
05 are arranged as shown in FIG.

The switch section 105 is a group of switches for making various settings during automatic accompaniment.

Rhythm switch (hereinafter referred to as SW) 105
1 consists of six switches #1 to #6, and by pressing any one of them, the rhythm during automatic accompaniment can be specified. In this case, each rhythm 5WI051 from #1 to #6 is assigned, for example, rock, waltz, march, samba, folk, fusion, and other rhythms.

The auto chord progression 5W1052 is a switch for specifying an auto chord progression mode, which will be described later, and when this is pressed, the LED above it lights up.

Start 5W1054 and stop 5W1055 are switches for starting and stopping automatic accompaniment.

Intro 5W1053, fill-in 5W1056, and ending 5W1057 are switches for starting intro performance, fill-in performance, and ending performance, respectively.

Tempo up 5W1058 and tempo down 5W105
9 are switches for increasing and decreasing the tempo of automatic accompaniment, respectively.

(Sai Feng Charm A 亙連韮) First, the general operation of the embodiment having the above configuration will be explained.

First, during normal performance without automatic accompaniment, the key information changes from the keyboard section 104 shown in FIG. 1 to the key information shown in FIG. 4! is done manually.

The key information Kl is 0N10FF information OF indicating the pressed key/M key
, a key code KC indicating one of the 12 scales, and an octave code OC indicating the octave. Then, when any key 1041 (FIG. 3) on the keyboard section 104 is pressed, the CPU 10I outputs the key code K.
Based on C and the octave code OC, pitch information corresponding to the pressed key is generated and supplied to the melody sound generating section 109. As a result, the melody sound generating section 109 generates a melody sound based on the pitch information, and the sound is emitted via the sound system 112.

Next, during automatic accompaniment, it is possible to specify two types: normal mode and auto chord progression mode.

First, in the normal mode, the performer can select one of six types of rhythms such as rock, waltz, etc. After that, when automatic accompaniment is started, the first
The rhythm sound generating section 111 shown in the figure starts producing rhythm accompaniment sounds using a plurality of rhythm instrument sounds in a rhythm pattern consisting of 16 independent stems for each rhythm instrument sound, and is repeated.

In this case, 16 steps correspond to, for example, one measure on the musical score, and therefore, for example, the same rhythm pattern is repeated for each measure.

In this state, the player presses the keyboard section 104 in FIG. 1 or 2.
By pressing any accompaniment key 1042 between 02 and B30, the accompaniment sound generating section 110 in FIG.
With a bass pattern consisting of six steps, accompaniment tones based on a predetermined bass tone are started and repeated. At the same time, the accompaniment sound generating section 110 of FIG. Accompaniment tones based on a chord consisting of four tones are started and repeated.

In this way, in the normal mode, if a rock rhythm is selected, for example, in addition to the rhythm accompaniment of the rock rhythm pattern using a plurality of rhythm instrument sounds, the chord tones specified by the performer with the accompaniment key 1042 in FIG. Based on the bass accompaniment of the rock bass pattern and bass tone, and the chord accompaniment of the rock chord pattern and chord tone,
Automatic accompaniment can be provided. At this time, the performer can freely play a melody in accordance with the accompaniment using keys 1041 of a higher pitch than 83 on the keyboard section 104 in FIG.

Next, in the auto chord progression mode, when you select a rhythm and start automatic accompaniment, the rhythm accompaniment starts and repeats as in the normal mode, and at the same time, the rhythm accompaniment starts and repeats as in the normal mode. also starts bass accompaniment and chord accompaniment with different bass patterns and chord patterns. In this case, the bass pattern and chord pattern repeat a predetermined 16-step pattern corresponding to the selected rhythm, but the bass note and chord note specified at this time follow a predetermined chord progression corresponding to the selected rhythm. is automatically specified over multiple measures.

In this way, in the auto chord progression mode, for example, if you select a rock rhythm, in addition to the rhythm accompaniment of the rock rhythm pattern using multiple rhythm instrument sounds, you will also receive the bass accompaniment of the rock bass pattern and bass progression, and the rock chords. Automatic accompaniment can be performed by using pattern and chord progression chord accompaniment. Then, the performer can freely perform a melody or the like in accordance with the accompaniment using any key 1041 of the keyboard section 104 shown in FIG.

In addition, in both normal mode and auto chord progression mode, the performer can play the intro 5W105 in Figure 3.
3. Fill-in 5W1056 and ending 5W10
57, various performance effects can be added, and the rhythm 5W1051 in FIG. 3 can be switched even during the performance.

(i in Normal Mode) Next, detailed operations in normal mode during automatic accompaniment will be explained. FIGS. 5 to 10 are flowcharts of operations when the CPU 101 executes a program (not particularly shown), particularly those related to the normal mode.

First, FCRIO II of FIG. 1 is shown in FIG. 13, and those related to the operation in normal mode are listed below.

Rhythm number register RR (Fig. 13(a)); 3rd
A 3-bit register pattern register PR (Fig. 13(b)) that indicates which rhythm is currently specified among the rhythms 5W1051 of #I to #6 in the figure; the current rhythm pattern or chord pattern is this pattern. 2-bit register Rhythm number register PRR indicating whether it is a fill-in pattern, an intro pattern, or an ending pattern (Fig. 13 (C))
:3-bit register accompaniment flag BF indicating the rhythm number immediately before the current rhythm is specified (Fig. 13<
e)! A 1-bit flag tempo data register TR (Fig. 13(f)) that indicates whether automatic accompaniment or autorhythm is currently in progress; a 5-bit register that indicates the current tempo, and the rhythm is set based on this tempo. Auto chord progression flag ACR (Figure 13 (g)) where counter RC counts up: 1-bit flag pattern change standby flag PTF (Figure 13 (c)) indicating whether or not the auto chord progression mode is in progress.
); Rhythm is switched or ending 5W105
7 (Figure 3) is pressed and until the pattern is actually switched, a 1-bit flag indicating whether or not the pattern is on standby is pressed, and the normal mode is set according to the operation flowcharts of Figures 5 to 10. The operation of the mode will be explained.

Waiting ■ First, when the performer turns on the power of the main body (not shown), the main operation flowchart shown in FIG. 5 starts, and initial processing is first performed at 3501.

Details of this process are shown in FIG. In other words, 56 in the same figure
Various flags are initialized in 01 to 5610.

Note that the reason why the contents of the tempo data register TR are initialized to 16 is to set the tempo to an intermediate value since the register can take values from 0 to 31 as described later. Further, the registers set in 5606 and 5610 are used during the operation of the autocode progression mode, which will be described later. After these processes, the initial process ends (S609-3610).

After the initial processing in FIG. 5 3501, 3502~
The processing loop of 3506 is repeated.

First, in step 5502, tempo processing is performed. Details of this processing are shown in FIG. That is, in step 5701, it is determined whether or not tempo up 5W1058 in FIG.
If it is determined that W has been pressed, the value of the tempo data register TR is incremented by 1 in 5704, the tempo is increased, and the tempo processing is ended (S704→S703). If the judgment in 5701 is No, the tempo down S in Fig. 3 is performed in S702.
It is determined whether or not WI 059 has been pressed, and if it is determined that the SW has been pressed, the tempo data register T is set in 5705.
The RO value is -1, the tempo is decreased, and the tempo processing is ended (S705→S703). Note that the value of the register is controlled so that it does not become less than O or more than 31, although not specifically shown. If the determination in 5702 is NO,
The tempo processing ends without performing tempo control (S702
→S 703).

After the tempo processing in 5502 of FIG. 5, the initial rhythm switching processing is performed in 5503. The details of this processing are shown in FIG.
Determine whether or not the has been switched, and if YES, 5
801→5802, a value corresponding to the rhythm number of rhythm 5W1051 is set in the rhythm number register RR, the rhythm is switched, and the initial rhythm switching process is ended (S803-3804). Here, Fig. 13 (
As shown in a), values from 0 to 5 are set in 3-bit binary numbers corresponding to rhythm numbers #1 to #6 (see also FIG. 3). On the other hand, if the rhythm 5W 1051 has not been switched and the determination in 5801 is No, the initial rhythm switching process ends without doing anything (S 801-5804).
.

After the initial rhythm switching process of 3503 in FIG. 5 above, 550
At step 4, it is determined whether or not auto chord progression 5W1052 in FIG. 3 has been pressed. Currently, in the normal mode, the SW is not pressed, so the determination is NO.

Subsequently, in step 5505, it is determined whether or not the intro 5W 1053 in FIG. 3 has been pressed. The case where the button is pressed will be described later.

If the determination at 5505 is NO, it is determined at 8506 whether or not the start 5W 1054 in FIG. 3 has been pressed.

If Start 5W1054 is not pressed, the above 550
The process repeats steps 2 to 5506 and waits until any one of autochord progression 5W1052, intro 5WI053, or start 5W1054 in FIG. 3 is pressed.

When the performer presses the star SW 1054 in FIG. 3 in the standby state shown in FIG. 5 5502 to 5506, the rhythm only playback operation starts.

First, after the determination in 3506 becomes YES, it is determined in 5509 whether the content of the accompaniment flag BF is 1 or not, that is, whether automatic accompaniment or autorhythm is being performed. now,
Since the flag is initially set to O in the initial processing at 5501 (3608 in FIG. 6), the autorhythm is initially in progress and the determination at 5509 is NO.

Subsequently, if the performer does not press the accompaniment key 111042 in FIG. 2, the determination at 5519 becomes NO, and the rhythm reproduction process at 5514 is performed. The details of this process are shown in FIG.

First, in steps 3901, 5902, and 5903, it is determined whether the value of the pattern register PR is 1.2 or 3, that is, whether the pattern to be automatically accompanied is a fill-in pattern, an intro pattern, or an ending pattern. When the performer presses START 5W1054, the register is initially set to O in the initial processing of 5501 (3605 in Fig. 6), so the pattern starts with this, and all judgments from 5901 to S903 are NO.
The process then proceeds to step 3904.

In S904, it is determined whether the pattern change standby flag PTFO value is 0 or not. The function of this flag will be described later, but since the flag is initially set to 0 in the initial processing of 3501 (3607 in Figure 6),
The determination in S904 is NO, and the process proceeds to S905.

At step 5905, the step indicated by the counter value of the RC (rhythm counter) 103 in FIG. 1 is read out of the 16-step main rhythm pattern corresponding to the rhythm number indicated by the rhythm number register RR. Now, CP
The pattern memory section 106 connected to Ul0I stores a rhythm pattern (the chord pattern and the bass pattern will be described later) having a structure as shown in FIG.

As shown in the figure, the rhythm pattern consists of four patterns: a main pattern, a fill-in pattern, an intro pattern, and an ending pattern.Furthermore, each of these patterns has 16 steps of 0 to 15 for each rhythm of #1 to #6. It consists of the following patterns. In FIG. 15(a), the first
The rhythm pattern of each 16 steps in Figure 4 is shown. As shown in the figure, during automatic accompaniment, whether or not to generate a rhythm sound for each step can be specified by a binary number of O or 1 for each of the eight rhythm instrument sounds. Here, BD is the bass drum sound, SN is the snare drum sound, CH is the closed by band sound, OH is the oven by bat sound, and T1 to T2 are the tom 1 sounds.
~Three toms, CY is a cymbal sound. From these configurations, in 8905 in FIG. 9, CPtJI in FIG.
O1 is the rhythm number (#1 to ##) corresponding to the value indicated by the rhythm number register RR among the main rhythm patterns shown in FIG. 14 stored in the pattern memory section 106.
6), the step corresponding to the counter value of Re2O3 in FIG. 1 is read out.

Following the above operation, at step 3906 in FIG. 9, an instruction is given to the rhythm sound generating section 111 in FIG. 1 to generate the rhythm sound for which "1" is specified in the read step. At this time, as shown in FIG. 15(a), in order to generate about 8 types of rhythm sounds in parallel, the above operation is also necessary for 8 tones, but this is because the rhythm sound generation section 111 of FIG. By time-division operation, each rhythm sound can be performed independently.

As a result, the rhythm sound generation section 111 generates rhythm sounds for each rhythm sound at timings based on the rhythm pattern, and the sounds are emitted via the sound system 112.

When the processing in 3906 is completed, the process proceeds to 3907, and 1
The rhythm sound playback process for the steps ends.

When the rhythm reproduction process for one step is completed at 8514 in FIG. 5, the routine waits for input of a timer clock from the timer clock generator 102 in FIG. 1 by repeating 5515.

When the timer clock is input, R in FIG.
CI03 is counted up.

After going through the processes of 5517 and 5518 (described later), the determinations of 5509 and S51.9 become No (these will also be described later), and the rhythm reproduction process of 5514 is performed again. In this case, at 3905 in FIG. 9, R in FIG.
Since the value of e2O3 is +1, the rhythm number (#1) corresponding to the value indicated by the rhythm number register R1' (of the main rhythm pattern of FIG. to #6) is read out from the main rhythm pattern.The step advances by one from the previous processing.Then, according to this read step, the rhythm sound generation processing is performed at 5906 in FIG. It will be done.

As mentioned above, S 509 → 5519 → 551 in Figure 5
By repeating the loop processing from 4-3515 to S518-3509, the rhythm number (any one of #1 to #6) corresponding to the value indicated by the rhythm number register RR in the main rhythm pattern in FIG. The 16-step main rhythm pattern is sequentially read out, and rhythm sounds are produced in accordance with it.

In this case, Re2O3 in FIG. 1 is a hexadecimal counter, and after counting up to step 15, the process returns to step O, so that each rhythm tone is repeatedly sounded for a predetermined 16 steps. These 16 steps correspond to, for example, one bar on the musical score. That is, each of the approximately eight types of rhythm tones during automatic accompaniment is played repeatedly in a fixed rhythm pattern for each bar.

In the rhythm sound only playback operation, the rhythm sound generation speed is the speed at which Re2O3 in FIG. 1 is counted up at 3516 in FIG. 5, that is, the timer clock is input from the timer clock generator 102 in FIG. It is determined by the speed.

The input timing of this timer clock is determined by CPUl0I in FIG.
Depending on the value of 31, 31 steps are determined. The value of the tempo data register TR is initialized to an intermediate value of 16 in the initial processing at 3501 in FIG. 5 (360 in FIG. 6).
2), it can also be changed at 3502 in FIG. 5 before automatic accompaniment.

In addition to this process, the performer also performs tempo up 5W105B or tempo down 5W10 in FIG. 3 during the rhythm sound playback.
By operating 59, the tempo data register TRO value can be changed at 5517 in FIG. This process consists of 5
This is exactly the same as the tempo processing in step 502, and is shown in FIG. 7, which has already been described.

Through the above processing, the performer can change the tempo of the rhythm sound being produced even during automatic accompaniment.

In the above rhythm sound-only playback operation, which rhythm pattern of rhythm number #1 to #6 is selected from among #1 to #6 in the main rhythm pattern in Figure 14 is determined by the rhythm pattern. Number register RR indicates (#1 corresponding to +!O~5
The rhythm number of ~#6 is selected.

The value of this rhythm number register RR is changed at step 5503 in FIG. 5 before the automatic accompaniment starts, but even when the performer is playing rhythm numbers #1 to #6 in FIG.
By selecting a desired one among W1051, the rhythm pattern can be changed arbitrarily. This operation is realized as a part of the various switching processes 5518 in FIG.
The details of the process are shown in FIG.

First, the determinations in Sl, 001 to S1003 are all NO (this will be described later), and the process proceeds to step 51004. Here, if rhythm 5WI051 in FIG. 3 is not switched, the determination in S1004 is NO, and 5IO1
At step 3, the various switching processes at 3518 in FIG. 5 are completed.

On the other hand, if the same SW is switched, the determination in step 31004 becomes YES, and the process proceeds to steps S1, O05, and S1006.

At step 31005, the value of the rhythm number register RR up to now is copied to the rhythm number register PRR.

In the next step 31006, a value corresponding to the rhythm number of rhythm 5W1051 is set in the rhythm number register RR to switch the rhythm.

Next, in step 31007, it is determined whether the counter value of Re2O3 (indicating the next step to be sounded) in FIG. It will be judged.

If the determination in S1007 is YES, that is, the timing is just right, the process proceeds to 31008, where it is determined whether the value of the autocode progress flag ACR is 1 or not. Currently in normal mode, the contents of ACR are 3 in Figure 5.
Since it is still initially set to O in the initial processing of 503 (3603 in Figure 6), this judgment is No and 3101
Proceed to step 2. In S1012, the value of the pattern change standby flag PTF is set to O, and then in S101
3, and the various switching processes shown in FIG. 55518 are completed.

That is, the value of PTF becomes O at exactly the right timing of the 16-step main rhythm pattern.

On the other hand, if the determination in S1007 is at the timing in the middle of the main rhythm pattern of 16 steps, S
Proceed to LO14 and pattern change standby flag PTF
585 in S 1013 after the value of is set to 1.
18 various switching processes are completed. In other words, at the timing in the middle of the 16-step main rhythm pattern, the PTF
The value of becomes 1.

After changing the value of the rhythm number register RR and setting the pattern change standby flag PTFO value as described above, the determination of 5509.5519 in FIG. 5 is NO.
Then, the rhythm reproduction processing of S514 is started again.

Here, if the rhythm changes at just the right timing of the main rhythm pattern of 16 steps, the value of the pattern change standby flag PTF is O, so after going through steps 5901 to 5903 in FIG. becomes YES. Therefore, in the next step 5905, the rhythm number corresponding to the new value indicated by the rhythm number register RR due to the rhythm switching among the main rhythm patterns of FIG. 14 stored in the pattern memory section 106 of FIG. The main rhythm pattern is sequentially read out from step O, and thereafter, rhythm sounds are produced using the changed rhythm pattern.

On the other hand, if the rhythm is switched in the middle of the 16-step main rhythm pattern, the value of the pattern change standby flag PTF is 1, so 5901 to 5901 in FIG.
After passing through 5903, the judgment of 5904 becomes NO and 590
Proceed to step 8.

At step 5908, among the main rhythm patterns shown in FIG. 14 stored in the pattern memory section 106 shown in FIG.
Read the step corresponding to the counter value. here,
Since the value corresponding to the rhythm number before the rhythm is switched is stored in the Brilliant Rhythm Number Register PRR, the value of RC10:3 in Fig. 1 is changed to 15 in the next 3909.
Until it is determined that this is the case, the process advances to 5906 and rhythm sounds are produced using the main rhythm pattern before the rhythm is switched.

Then, the loop of 5509 to 5518 in FIG.
The above rhythm reproduction process of 514 is repeated, and 3 of FIG.
When the value of Re2O3 in FIG. 1 becomes 15 in 909, that is, when the rhythm pattern to be generated next becomes the final 15 steps, the determination becomes YES.
After the next determination at 5910 is NO (the ACR value is 0 because it is normal mode), the value of the pattern change standby flag PTF is returned to O at 3913, and the process proceeds to 5906 where the rhythm is changed to the previous pattern before the rhythm is switched. The final step of the rhythm pattern is sounded. After this operation, 3509 in FIG.
When the rhythm playback process of 3514 is started again after going through the loop of ~8518, PTF is set to O, so 590 of FIG.
4 becomes YES, and in 5905, among the main rhythm patterns of FIG. 14 stored in the pattern memory section 106 of FIG. 1, the new rhythm indicated by rhythm number register 1≧R is The main rhythm pattern of the rhythm number corresponding to the value is sequentially read out from step 0, and from then on, rhythm sounds are produced using the changed rhythm pattern.

In this way, when the rhythm is switched at a timing in the middle of the 16-step main rhythm pattern, the main rhythm pattern before the rhythm switch is sounded until a good timing is reached, and then the new main rhythm pattern is switched.

The operation when the performer presses the fill-in 5W 1056 in FIG. 3 while the rhythm reproduction process in 5514 is being replayed by the loop in 5509 to 5518 will be described. In this case, the rhythm sound is generated using the fill-in rhythm pattern from that timing until the 15th step, and then the main rhythm pattern is returned to.

The switching preparation process for this purpose is performed in various switching processes 5518 in FIG. That is, in FIG. 10, since the determination of 5iooi is YES, S 10
Moving on to step 15, the value 1 is set in the pattern register PR.
is sent, and the various switching processes 5518 in FIG. 5 are terminated in S1013.

After the value of the pattern register PR is changed as described above, the determination at 5509 and 5519 in FIG. 5 becomes No, and the rhythm reproduction processing at 5514 is started again.

Then, in FIG. 9, since the PR=1, the determination in 5901 becomes YES, and the process proceeds to 3914. 5914, the first pattern stored in the pattern memory section 106 in FIG.
Among the fill-in rhythm patterns in FIG. 4, the step corresponding to the counter value of Re2O3 in FIG. 1 is read out from the fill-in rhythm pattern of the rhythm number corresponding to the value indicated by the rhythm number register RR.

Thereafter, until the next step 5915 determines that the value of Re2O3 is 15, the process proceeds to 3906 and rhythm sounds are generated in the fill-in rhythm pattern.

As shown above, even if the rhythm is switched in the middle of the 16-step main rhythm pattern, it is immediately changed to the fill-in rhythm pattern. Thereby, a fill-in effect can be added to the rhythm sound being generated at the timing when the performer presses the fill-in 5W1056 in FIG. 3.

Based on the above operations, when the rhythm playback process of S 514 is repeated through the loop of 5509 to 5518 of FIG. 5, and the value of RCIO3 of FIG. 1 becomes 15 at 5915 of FIG. When the rhythm pattern to be generated reaches the final 15 steps, the determination in 5915 becomes YES and the process advances to 5916.

At 3916, the contents of the pattern register PR are returned to 0, and preparations are made to return to the main rhythm pattern. continue,
Processes 5916 to 5919 are performed, and these processes are performed in an autochord progression mode, which will be described later. After these processes, the process advances to 5906 and the rhythm sound of the final step of the fill-in rhythm pattern is generated.

After the above operation, when going through the loop of 5509 to 5518 in FIG. 5 and entering the rhythm playback process of 5514 again, the determination in 5901 to S 903 of FIG. 9 becomes NO because PR has been set to O, and the main Return to sound production using rhythm patterns.

The operation when the player presses the ending 5W 1057 in FIG. 3 while the rhythm reproduction process 5514 is being repeated in the loop 5509 to 5518 will be described. In this case, after using this rhythm pattern to play the rhythm sounds until they are well-defined, play the rhythm sounds using the 16-step ending rhythm pattern.
Ends automatic accompaniment using rhythm sounds.

The switching preparation process for this purpose is performed in various switching processes 3518 in FIG. That is, in FIG. 1O, since the determination in S 1002 is YES, S 1
The process moves to step 016, where the value 3 is set in the pattern register PR, and the process proceeds to step S1007.

In S1007, the Re2O3 counter value in Figure 1 is 0.
In other words, it is determined whether or not the actual timing of the 16-step rhythm pattern is just right.

If the determination in S 1007 is YES, that is, the timing is just right, the determination in 3100B is N.

The process proceeds to 31012, and after the value of the pattern change standby flag PTF is set to 0, the fifth
The various switching processes shown in FIG. 3518 are completed. That is, as in the case of rhythm switching during the rhythm sound reproduction operation, the value of the PTF becomes 0 at exactly the right timing of the 16-step main rhythm pattern.

On the other hand, if the determination in S1007 is No, that is, the timing is in the middle of the main rhythm pattern of 16 steno knobs, then 51
After proceeding to step 014 and setting the value of the pattern change standby flag PTF to O, the process proceeds from step S1013 to step 551 in FIG.
The various switching processes in step 8 are completed. That is, at a timing in the middle of the 16-step main rhythm pattern, the value of PTF becomes 1. This is also the same as the case of rhythm switching.

After changing the value of the pattern register PR and setting the value of the pattern change standby flag PTF as described above, the determination at 5509 and 5519 in FIG. 5 becomes NO, and the rhythm playback process at 5514 is started again. enter.

Then, the determination of 5903 in FIG. 9 becomes YES, and 5
The program then proceeds to 920 to begin processing the ending rhythm pattern.

Here, at the perfect timing of the main rhythm pattern of I6 step, the ending 5WI0 of Figure 3 is played.
When 57 is pressed, pattern change standby flag PT
Since the value of F is O, the determination in 5920 is YES. Therefore, in the next step 8921, among the ending rhythm patterns of FIG. 14 stored in the pattern memory section 106 of FIG. are read out sequentially, and then the next 59
5 until the value of RC1,03 is determined to be 15 in 22.
Proceeding to 906, rhythm tones are generated using the ending rhythm pattern.

Then, the loop from 5509 to 5518 in FIG.
The above rhythm playback process of 514 is repeated, and Re2O3
When the value of becomes 15, that is, when the next rhythm pattern to be sounded is the final 15 steps, 592
The determination in step 2 is YES, and in step 5923, the final step of the ending rhythm pattern is sounded.

After this operation, the process jumps from 5923 to the process of S1017 via the path shown in FIG. And the judgment of S1017 is NO
(in the normal mode, the ACRO value is O), the process jumps from 51017 to the process 5603 and subsequent steps via the route shown in 3501 in FIG. After this process, after the initial process of 5501 in FIG. 5 is performed (processing after 3603 in FIG. 6),
The process from 5502 to 5506 is repeated and the process waits until any of the auto chord progression 5W1052, intro 5W1053, or start 5WIO54 in FIG. 3 is pressed. Note that the initial settings of the rhythm number register RR and tempo data register TR of 5601 and 5602 in Fig. 6 are not performed, and when the start 5W1054 etc. It begins.

On the other hand, if ending 5W1057 in FIG. 3 is pressed in the middle of the 16-step main rhythm pattern, the value of the pattern change standby flag PTF is 1, so the determination in 3920 in FIG. 9 becomes NO and goes to 5924. move on.

5924, from among the main rhythm patterns of FIG. 14 stored in the pattern memory section 106 of FIG. 1, the rhythm pattern of Re2O3 of FIG. The step corresponding to the counter value is read out, that is, until the next step 5909 determines that the value of Re2O3 in FIG. 1 is 15, the process advances to 3906 and rhythm sounds are generated according to this rhythm pattern.

Then, the loop of 5509 to 5518 in FIG.
The above rhythm reproduction process of 514 is repeated, and 3 of FIG.
When the value of Re2O3 in FIG. 1 becomes 15 in 909, that is, when the rhythm pattern to be generated next becomes the final 15 steps, the determination becomes YES.
After the next determination at 8910 is NO (because it is the normal mode, the ACR value is O), the value of the pattern change standby flag PTF is returned to O at 5913, and the process advances to 5906 to start the final step of the main rhythm pattern. pronounced.

After this operation, when the loop from 5509 to 5518 in FIG.
is set to O, the determination at 3920 in FIG. 9 becomes YES, and the subsequent 16 steps are 5920-392.
By processing 1→5922→5906, rhythm sounds are produced in the ending rhythm pattern.

Then, when the rhythm sound generation process is repeated and the value of Re2O3 reaches 15, the determination in 5922 becomes No, and after the final step of the ending rhythm pattern is generated in 5923, the automatic Ends the accompaniment movement.

As shown above, when the automatic accompaniment ends, the performer
By pressing the ending SWI O57 shown in the figure, an ending effect can be easily added to the rhythm pattern.

The operation when the performer presses the intro 5W 1053 in FIG. 3 to start the rhythm reproduction process 5514 through the loop 5509 to 5518 will be described. In this case, first, rhythm tones for 16 steps are generated using the intro rhythm pattern, and then the rhythm tones are generated using the main rhythm pattern.

First, in the standby state due to the processing loop of steps 5502 to S506 in FIG.
When you press 053, the judgment of 5505 becomes YES and 5
The process advances to step 507, where the value 2 is set in the pattern register PR, and the intro rhythm pattern mode is entered. After that,
Similar to when the start 5W1054 (Fig. 3) was pressed, the judgments of 5509 and 5519 are NO, and 551
Step 4 begins the rhythm playback process.

In this case, the determination at 3902 in FIG. 9 is YES and 59
26, at 3926 the pattern memory section 4 of FIG.
Among the intro rhythm patterns shown in FIG. 14 stored in 06, the intro rhythm patterns of rhythm numbers corresponding to the values indicated by the rhythm number register RR are sequentially read out from step O.

After that, in the next 5927, the value of Re2O3 in Figure 1 is 15
Until it is determined that this is the case, the process proceeds to 5906 and rhythm sounds are generated using the intro rhythm pattern.

Based on the above operations, the rhythm playback process of 5514 is repeated through the loop of 5509 to 5518 in FIG.
In 8927 in Figure 9, the value of RCI03 in Figure 1 is 1.
5, that is, when the rhythm pattern to be generated next becomes the final 15 steps, the determination in step 3927 becomes YES, and the process advances to step 3928.

At 3928, the contents of the pattern register PR are changed to 0, and preparations for transition to the main rhythm pattern are made. After this processing, the process advances to 5906 and the final step of the intro rhythm pattern is sounded.

After the above operation, when the loop from 5509 to 5518 in FIG.
is set to 0, the determinations in steps 3901 to 5903 in FIG. 9 become NO, and the process shifts to the sound generation operation based on the main rhythm pattern.

As described above, the performer can easily add an intro effect to the rhythm pattern by pressing the intro SW 1053 in FIG. 3 when starting automatic accompaniment.

The operation when the performer presses stop 5W1055 in FIG. 3 while the rhythm reproduction process 5514 is being repeated in the loop 5509-351B will be described.

In this case, in the various switching processes 3518 in FIG.
The determination of 51.003 in Figure io is YES, and S 1
Proceed to 017. Then, since the determination in S1017 is NO (the value of ACR is O in normal mode),
From 51017, the process jumps to steps 5603 and subsequent steps via the path 3501 in FIG. The subsequent processing is the same as the processing at the end of the automatic accompaniment when the player presses the ending SWIO57 in FIG.

In the middle of the rhythm playback process of 5514 being repeated through the loop of 5509 to 5518, the performer plays the notes between 02 and Bff No. of FIG. 2 on the keyboard section 104 of FIG. The operation when one of the accompaniment keys 1042 is pressed will be explained.

In this case, from the keyboard section 104 to cpuiOl in FIG.
Key information Kl shown in FIG. 4 corresponding to the pressed accompaniment key is input.

This human power state is detected at 8519 in FIG. 5 while the rhythm sound is being generated, and the determination is YES.

As a result, first, at 5520, the accompaniment flag BF is set to 1, and the mode shifts to accompaniment mode.

Subsequently, in 5521, code judgment is performed.

This is because the key information Kl is passed from the CPUI Oi in FIG. This process determines the root note and chord of the key.

Next, in 5512, a bass sound reproduction process is performed. This process is a process for accompaniment with a bass sound at the pitch of the root note determined by the chord judge section 108 in FIG. 1. The same process as the rhythm playback process in step 5514 is performed, so the details are also similar to the details of the rhythm playback process in FIG.

In this case, the pattern memory section 106 in FIG.
A base pattern having the same structure as the rhythm pattern shown in FIG. 4 is stored.

That is, the base pattern consists of four patterns: a main pattern, a fill-in pattern, an intro pattern, and a ending pattern, and each pattern is composed of 16 step patterns for each rhythm #1 to #6. FIG. 15(C) shows the base pattern of each of the 16 steps in FIG. 14. As shown in the figure, it is possible to specify with a binary number of 0 or 1 whether or not one type of bass tone is to be generated for each step during automatic accompaniment.

In conjunction with the above configuration, by performing the base playback process 5512 in FIG. 5 in accordance with the rhythm playback process 3514, rhythm sounds based on the main rhythm pattern, fill-in rhythm pattern, ending rhythm pattern, and intro rhythm pattern can be reproduced. In synchronization with the playback process, the playback process of the bass sound based on the main bass pattern, fill-in bass pattern, ending bass pattern, and intro bass pattern is performed. That is, the operations when playing the bass sound for the fill-in 5W 1056, ending 5W 1057, intro 5W 1053, etc. in FIG. 3 are exactly the same as those for playing the rhythm sound.

Note that the bass note (which is a single note) is generated by the accompaniment tone generating section 110 shown in FIG.
is configured to be able to generate multiple musical tones in parallel through time-sharing processing.

Next, at 5513, chord tone reproduction processing is performed. This process is a process for performing a chord accompaniment using the chord determined by the chord judge section 10B in FIG. 1, and performs the same process as the rhythm reproduction process in step 5514 above, except that the chord is specified. Therefore, as in the case of bass sound reproduction, the details will be explained in the 9th section.
This corresponds to the details of the rhythm playback process shown in the figure.

In this case, the pattern memory section 106 in FIG.
A chord pattern having the same structure as the rhythm pattern shown in FIG. 4 is stored.

FIG. 15(b) shows the code pattern for each of the 16 steps in FIG. 14. As shown in the figure, during automatic accompaniment, you can select whether or not to sound one type of chord tone (3 to 4 notes are sounded as a chord at the same time) for each step.
Can be specified in decimal numbers.

In addition to the above configuration, since the chord reproduction process 5513 in FIG. 5 is based on the rhythm reproduction process 3514, the rhythm sound reproduction process based on the main rhythm pattern, fill-in rhythm pattern, ending rhythm pattern, and intro rhythm pattern In sync with this code pattern,
Cor [' sound reproduction processing is performed based on the fill-in chord pattern, the ending chord pattern, and the hint chord pattern. That is, fill-in 5W in FIG.
1056, Ending 5W1057, Intro SW1
The operation when playing a chord tone such as 053 is exactly the same as when playing a rhythm tone.

Note that the reproduction of the chord sound is performed by the accompaniment sound generation section 110 shown in FIG. 1, as described above. In this case, since the chord tones usually consist of 3 to 4 tones, these multiple tones are produced in parallel by time-sharing processing.

In the above bass tone and chord tone reproduction processing, the fifth
Once the key information KI is input from the accompaniment key 1042 (FIG. 2) at 8519 in the figure, the accompaniment flag BF is set to 1 at 5520, so the determination at 5509 is not performed from the next step. The result is YES, and furthermore, the determination at 5510 is No (the ACR value is 0 because it is the normal mode), and a code jump is performed directly at 5521. Therefore, when playing the bass note and chord note at each step by repeating the loop from 5509 to 5518, if no new key information Kl is input, the same root note pitch and chord will be repeated, and the player will be If the accompaniment key 1042 in FIG. 2 is pressed anew, the pitch and chord of the root note will be changed accordingly.

As described above, when the performer presses the accompaniment key 1042 shown in FIG. By pressing the accompaniment keys 1042 one after another, automatic accompaniment can be performed while changing the pitch of the bass note and the chord type of the chord note at that timing.

(Auto chord mode) Next, detailed operations in auto chord progression mode during automatic accompaniment will be explained. In addition to the operation flowcharts shown in FIGS. 5 to 10, FIGS. 11 and 12 are operation flowcharts related to the autochord progression mode.

First of all, the FCRroll in Figure 1 shown in Figure 13 above.
In addition to what was explained in the normal mode, things related to the operation in the auto chord progression mode are listed below.

Progression register SR (Fig. 13(d)); 2-bit register tone length counter OC indicating whether the current chord progression data is a main chord progression, a fill-in chord progression, an intro chord progression, or an ending chord progression; Counter code counter CC that subtracts and counts the note length of the progression; Counter chord name register CC that counts up the address of chord progression data
R, register for storing chord name data CD, scale code register 0TCR, register for storing scale data OTD, and so on.The operation of the auto chord progression mode will be explained in accordance with the operation flowcharts of FIGS. 5 to 12.

Autochord - Mode First, when the player turns on the power to the main unit (not shown), the player enters the standby state described in the normal mode, that is, in the repeated operations 5502 to 5506 in FIG. Auto chord progression 5W1052 in Figure 3
When you press , the judgment of 5504 becomes YES, so 3
The process proceeds to autochord progression mode processing 508. This processing is a standby state process before starting the autochord progression operation, and its details are shown in FIG.

First, in 5IIOI, the auto chord progression flag ACR is set to a value 1 indicating the auto chord progression mode.

In the next 31102, auto chord progression 5W1 in Figure 3
The LED above 052 is lit to notify the performer that the auto chord progression mode has been entered.

Subsequently, in step 31103, the accompaniment flag BF is set to a value l indicating that accompaniment is in progress. This is because in the autochord progression mode, an accompaniment operation using bass notes and chord notes is always performed.

Furthermore, in 31104, the current rhythm number register RR
Tempo data TD corresponding to the rhythm number specified by is set in the tempo data register TR. Now, the chord progression memory section 107 in FIG.
Tempo data TD is stored as a rhythm header corresponding to each of rhythm numbers #1 to #6 as shown in FIG.

Details of the tempo data TD are shown in FIG. 17. As shown in the figure, the tempo data TD is 5-bit binary data, and can specify a tempo from 0 to 31. By having tempo data TD corresponding to each rhythm number, the performer can perform rhythm 5W105 in FIG.
1, the tempo data TD corresponding to the selected rhythm number is stored in the chord progression memory section 10 of FIG.
7 is read from the rhythm header and set in the tempo data register TR. This is because, for example, rock has a fast tempo and waltz has a relatively slow tempo, so when the rhythm is switched, the optimum tempo is automatically set.

After the processing of S 1101 to 51104 above, 51105
-5l109 is repeated to enter the input waiting state of each switch. In other words, in auto chord progression mode, 5
Through the determination processes 1106, 31107 and 51108, the auto chord progression mode is started when the performer presses either the star 1-3W 1054, rhythm SWI 051 or intro 5W 1053 in FIG. Each of these will be described later.

Here, 31105 is a process that allows the performer to arbitrarily change the tempo when performing automatic accompaniment from now on using tempo up 5W1058 or tempo down 5W1059 in FIG. 3 while waiting in the auto chord progression mode. , is the same as the tempo processing at 3502 in FIG. 5 during normal mode standby (see FIG. 7).

In addition, 51109 is the auto chord progression 5W1052 shown in FIG.
If is pressed again, the process exits the auto chord progression mode and returns to the initial state again. That is,
When auto code progression 5W1052 is pressed, 3110
The determination in step 9 is YES, and as a result, the value of the auto chord progression flag ACR is returned to 0 at 51115 to return to normal mode, and furthermore, the LED above auto chord progression 5W1052 in FIG. 3 is turned off at 51116. Ru. After these operations, the process jumps from 51116 to the process 5603 and subsequent steps via the path 5501 in FIG. The subsequent processing is performed when the performer performs the ending 5W1057 in Figure 3 in normal mode.
This is the same process as when the automatic accompaniment ends when is pressed.

While waiting in the autochord progression mode of S11.05-51109 in Figure 11, the performer selects the start 5W10 in Figure 3.
If you press either 54 or Rhythm 5W1051,
Enters auto code progression processing. In addition, intro 5WI0
The case where 53 is pressed will be described later.

First, if Start 5W1054 is pressed, 311
The judgment of 07 is YES, and 5IIIO is shown in Fig. 5550.
The autochord progression mode processing at step 8 ends, and the process proceeds to the autochord progression mode processing at step 5511.

Further, if any of the rhythm SWIO51 is pressed, the determination in 51108 becomes YES and the process advances to 3111.1. In 5llll, the value corresponding to the rhythm number of the pressed rhythm 5W1051 is stored in the rhythm number register R.
Set it to R to switch the rhythm. Also, the following 5111
In step 2, the tempo data register TD corresponding to the rhythm number set in the rhythm number register RR is set in the tempo data register TR, similar to the operation in step 51104. After these processes, 5111.0 and 3508 in FIG.
The auto-chord progression mode processing is ended, and the process proceeds to auto-chord progression processing at S511.

As described above, start 5W1054 or rhythm 5
When W1051 is pressed, the auto chord progression process of 3511 in FIG. Then, the processes 5509 to 5518 in FIG. 5 are repeated. In this case, the determination of 5509 is 3 in FIG.
Y because the accompaniment flag BF is set to 1 at 1103.
ES, and the judgment of 5510 is also 5I in Figure 11.
Since the autocode progress flag ACR is set to 1 at IOI, the result is YES. Therefore, in the auto code progression process, 5509-3510-3511 to 551B -3
The loop processing of 509 is repeated. This process will be explained below.

First, in the loop from 5509 to 5518, 5514
The rhythm playback process is exactly the same as the rhythm playback process in the normal mode, and the rhythm sounds are repeatedly produced in a rhythm pattern of 16 steno knobs.

Furthermore, the bass playback process in S512 and the chord playback process in 3513 are similar to the operations performed when the performer presses the accompaniment key 1042 in FIG. and chord pattern, repeating the accompaniment by the bass note and the chord note.

That is, for example, the production of rhythm tones of the same rhythm pattern, bass tones of the same bass pattern, and chord tones of the same chord pattern are repeated for each measure. Note that the rhythm pattern, bass pattern, and chord pattern are each independent patterns.

In the above operation, the pitch during the bass playback process and the chord type during the chord playback process were specified by the performer sequentially using the accompaniment keys 1042 in FIG. 2 in the normal mode; mode, these specifications are automatically made over multiple measures,
A major feature of this is that the burden on the performer is significantly reduced.

In order to realize the above operation, chord progression data having a structure as shown in FIG. 16 is stored in the chord progression memory section i07 connected to the CPU lOf in FIG. As shown in the figure, the chord progression day/evening consists of four types of chord progressions: main chord progression, fill-in chord progression, intro chord progression, and ending chord progression. It is composed of chord progression data of 32 steps of kQ to 31 for each rhythm of 6.

FIG. 18 shows chord progression data for each of the 32 steps in FIG. 16. The scale data OTD specifies scale names such as A and F' using 4-bit binary data. The code name data CD is a minor (
m) - Specify major (M), seventh (7th), etc. Therefore, the chord type for each step is determined by the scale data OTD and the chord name data CD.

The tone length data OD is 4-bit binary data that specifies how long each chord is to be sounded, and its minimum unit is one step of a rhythm pattern, etc., such as a 16th note, an 8th note, etc. etc.

The tone length data OD for each step is subtracted during sound generation, as will be described later, and when it becomes 0, the process moves to the next step. Note that the tone length data OD for appropriate steps up to the 31st step includes 111 indicating the end, as shown in FIG. 18 (the 31st step is shown in the figure).
It contains data of 1'(F' in hexadecimal representation),
A code type with an arbitrary step length can be specified by using the following steps excluding this step.

In this case, the concept of the steps in FIG. 16 or 18 is different from the steps of the rhythm pattern, bass pattern, chord pattern, etc. in FIG. 14 or 15. In other words, one step of the chord progression data is
As described above, this is a plurality of steps such as a rhythm pattern defined by the note length data OD. Hereinafter, in order to distinguish them, steps such as rhythm patterns will be referred to as pattern steps, and steps of chord progression data will be referred to as chord steps. Therefore, while the bass pattern and chord pattern repeat 16 pattern steps for each measure, the chord progression data that defines the bass pitch and chord type at that time is, for example, the chord of the first chord step with a C1 note length of 8 , the chord of the first chord step is Am, the note length is 8, the chord of the second chord step is F,
The length of the note is 8, and the chord of the third chord step is CJ? , the note length is 4, the chord of the 4th chord step is C1 note length is 4, etc.
..., then the first 8 pattern steps of the first measure are the C chord, the next 8 pattern steps are the Am chord, and the 2nd pattern step is the C chord.
The first 8 patterns of the measure are an F chord, and the next 4
The automatic accompaniment in the auto chord progression mode progresses as chords are specified, such as the G7 chord for the Bakoon step, the C chord for the last 4 pattern steps, etc. It is specified by the root note (first note) of each chord.

Figure 5 5511 to realize the operation specified by the above code
The details are shown in FIG.

First, the determination in S1201 is initially YES because the tone length counter OC is initially set to O in the initial processing in FIG. 5 3501 (FIG. 6 3609).

Next, in S1202, S L203, and 51204, it is determined whether the value of the progression register SR is 1.2 or 3, that is, whether the chord progression to be automatically accompanied is a fill-in chord progression, an intro chord progression, or an ending chord progression. It is determined whether or not. The performer presses the start switch in Figure 3.
When I O54 or Rhythm 5W1051 is pressed,
Since the register is initialized to 0 in the initial processing at 3501 in FIG. 5 (3606 in FIG. 6), the code progresses at the beginning, and all determinations at steps 51202 to 51204 are NO, and the process proceeds to step 31205.

Si, 205, among the main chord progression data of FIG. 16 stored in the chord progression memory section 107 of FIG.
From this chord progression data corresponding to the rhythm number indicated by the rhythm number register RR, the chord counter CC
The code counter CC is currently performing the process of reading out the code step indicated by the counter value of , since its value has been initialized to O in the initial process of 3501 in FIG.
At step S609 in FIG. 6, the chord progression data of the 0th chord step is initially read out.

Next, until the final step, the determination in S1206 is NO and the process advances to S1209. Here, first, the tone length data OD (see FIG. 18) of the O-th chord step is set in the tone length counter OC, and then in 31210, the tone length data OTD of the O-th chord step is set in the scale code register 0TCR. In the following S1211, code name data CD is set in the code name register CCR.

This completes the designation of the code type corresponding to the Oth code step.

After the above processing, in S1212 the code counter CC
The O counter value is +1, and at 51213, the counter value of the note length counter OC is -1, and at the next 5121.3, the fifth
The autochord progression process in FIG. 5511 ends.

After the above processing, bass reproduction processing is performed in 5512, but the scale at this time is the scale data OT of the Oth chord step set in the scale code register 0TCR.
The scale corresponding to D is designated.

Furthermore, chord reproduction processing is performed in step 5513, but the chord type at this time is the scale data OTD of the Oth chord step set in the scale code register 0TCR and the chord name data CD set in the chord name register CCR. specified based on.

In addition to the above bass playback process and chord playback process, the rhythm playback process is performed at 3514 in FIG.
Automatic accompaniment for one pattern step is completed.

Thereafter, by repeating step 5515, the timer clock is manually generated from the timer clock generator 102 in FIG.
At 6, Re2O3 in FIG. 1 is counted up. Then, after undergoing the processing of 3517.351 (described above),
Each judgment of 5509.5510 becomes YES, and 5 is returned again.
511 auto chord progression process. In this case, the first
In 31201 of FIG. 2, the tone length counter OC was previously set to the tone length data OD of the Oth chord step, so the determination in 31201 is No until the value reaches O. In this case, only the process of decrementing the tone length counter OCO counter value by 1 is performed in S1213, and the fifth
The autochord progression process in FIG. 8511 ends. Therefore, in the bass reproduction process 5512 and the chord reproduction process 5513 in FIG. 5, the same scale and chord type as in the previous pattern step are specified.

In the above state, the value of the tone length counter OC is subtracted and O
This continues until the pattern steps corresponding to the tone length data OD of the 0th chord step are repeated.

Then, when the value of the tone length counter OC is determined to be O at 31201 in FIG. Performs a process of reading out the chord step indicated by the chord counter CCO counter value from the main chord progression data to be processed.
Now, since the chord counter CC is incremented by 1 at 31212 at the beginning of the reading of the first step, it is pointing to the value 1, and therefore, the chord progression data of the first chord step is read out here. Then, similarly to the 0th chord step, in steps S1209 to S1211, the contents of the tone length counter OC1 scale code register 0TCR and the chord name register CCR are set to correspond to the chord progression data of the first chord step, and At 1212, the chord counter CCO value is incremented by 1, at S1213 the note length counter OCO value is incremented by 1, and at SL214, the auto chord progression processing at 3511 in FIG. 5 is ended.

As a result of the above processing, in the bass playback process 8512 and the chord playback process 5513 in FIG. 5, the scale and chord type are specified based on the scale data OTD and chord name data CD of the first chord step, and this state is The pattern steps continue until the step's tone length data OD are repeated.

The above operation is repeated while sequentially reading each chord step of the present chord progression data, and when the final chord step of the present chord progression data is read out at 31205 in FIG. 12, the tone length data OD is as described above. 16
Since it is 1F# in decimal notation, the determination in 31206 is YES. As a result, the chord counter CC is set on the OIJ in the next step 31207, and the chord progression data of the 0th chord step is read out again in the step 31208.
31209 and subsequent processes are repeated.

Therefore, when the main chord progression data is read and the final chord step is reached, this code step is not read out, and the program returns to the 0th chord step again to repeat the same chord progression.

During the above autochord progression process, the performer can perform tempo up 5W1058 or tempo down 5W10 in FIG.
By operating 59, the value of the tempo data register TR can be changed at 8517 in FIG. This process consists of 5
This is exactly the same as the tempo processing in step 502, and is shown in FIG. 7, which has already been explained.

Next, the operation when the rhythm is switched during the autochord progression process will be described. This processing is similar to the processing when the rhythm is switched during the operation of reproducing only the rhythm sound. However, in the auto chord progression mode, the chord progression memory section 1 in Figure 1 is
A rhythm header as shown in FIG. 16 is stored in 07, and when the rhythm is changed, the tempo data is also changed correspondingly. Therefore, it is necessary to add this processing.

That is, first, the determination of 31007 in FIG. 10 is YES.
In other words, if the rhythm changes at the perfect timing of the 16-step main rhythm pattern,
In normal mode, after the judgment of s1oos becomes NO, the pattern change standby flag PTF is set in S1012.
However, during autochord progression processing, the judgment of s 100s is YES, and then the judgment of S 1009 is No (the value of the pattern register PR is currently O for this rhythm pattern). ), 5IOI
Proceed to O. Here, similar to the operation of 31104 in FIG. 11, 31006 in FIG. 1O is used to register the rhythm number register RR.
Tempo data TD corresponding to the rhythm number set in is set in the tempo data register TR. After this process, as in the normal mode, 51
At S1012, the pattern change standby flag PTF is set to 0, and at S1013, the various switching processes shown in FIG. 5 are ended.

On the other hand, if the rhythm changes at a timing in the middle of the 16-step main rhythm pattern, in normal mode, 5904→S in Figure 9
908-S After the process of 909 → 5906 is executed, after the rhythm is pronounced in the simple rhythm pattern in which the rhythm is switched, when the break is at a good timing, the determination in 5909 in FIG. 9 becomes YES, and further, The judgment was NO, and the pattern change standby flag PTF was set to 0 at 5913 to switch the rhythm.
During auto-chord progression processing, when the break is at a good timing, after the determination in 3909 in Figure 9 becomes YES,
The determination in 5910 is YES. Furthermore, since the determination of 5911 is NO (because the current value of PR is O), 591
2, the tempo data TD corresponding to the rhythm number set in the rhythm number register RR is placed in the tempo data register TR in 31006 in FIG. 10, similar to the operation 31104 in FIG. And then 5
In step 913, the pattern change standby flag PTF is set to 0.

As described above, when the rhythm changes, the contents of the tempo data register TR are changed to a new value, and thereafter, the timing at which the timer clock is input is determined at 3515 in FIG. 5 according to the contents of this register. 551
At step 7, the speed at which Re2O3 in FIG. 1 is counted up is determined.

Note that if the rhythm changes at a timing in the middle of the 16-step main rhythm pattern, in the rhythm playback process of 5514 in FIG. The main bass pattern in the bass playback process of 5512 and the main chord pattern in the chord playback process of 5513 are the same, but the main chord progression data in the auto chord progression process of 5511 does not change the rhythm. When the rhythm number register RR is switched, at 31205 in FIG. 12, the chord progression data is immediately switched to the main chord progression data corresponding to the new rhythm number indicated by the rhythm number register RR.

The operation when the performer presses the fill-in 5W 1056 in FIG. 3 while the automatic accompaniment in the auto chord progression mode is being repeated by the loop 5509 to 5518 in FIG. 5 will be described.

In this case, in the rhythm reproduction process of 3514 in FIG. 5, as in the case of normal mode, 3901-3 in FIG.
By repeating the process 914-3915=3906, when the fill-in 5W1056 is pressed, the main rhythm pattern immediately changes to the fill-in rhythm pattern. The same applies to the base pattern and chord pattern in the bass playback process of 5512 and the chord playback process of 5513.

On the other hand, in the auto chord progression process of 5511, the content of the progression register SR does not change just by pressing the fill-in 5W 1056, but indicates the value O, that is, the main chord progression. Then, the rhythm playback process in Figure 9 (
In Figure 5 (3514), until the pattern step of the fill-in rhythm pattern reaches the final 15th pattern step and the determination in 3915 becomes YES, the content of SR remains O, so the processing state in Figure 12 is There is no change, and this chord progression is maintained.

In the rhythm playback process shown in FIG.
At step 6, the pattern register PR is set to O and the routine returns to the main rhythm pattern. On the other hand, since the progress register SR is set to 1 at 5917, the chord progression data becomes a fill-in chord progression. And 3918.5919
The chord counter CC and note length counter OCO counter values are forcibly reset to 0. At this time, the base pattern and the chord pattern have also returned to the main pattern in the bass reproduction process 3512 and the chord reproduction process 5513 in FIG.

As a result, the determination in S1201 in FIG. 12 becomes YES, and furthermore, the determination in S1202 becomes YES, and the
Proceed to 215. Then, from among the fill-in chord progression data corresponding to the rhythm number indicated by the rhythm number register RR, a process is performed to read out the chord step indicated by the counter value of the chord counter CC, that is, the O-th chord step. After this, S 1216-312
09→S 1210-31211→51212-312
13, the O-th chord step of the fill-in chord progression data is set, etc.

Below, it operates exactly the same as in the case of this chord progression data,
In the bass playback process 8512 and the chord playback process 5513 in FIG. 5, the scale and chord type are specified by the scale data OTD and chord name data CD of the 0th chord step based on the fill-in chord progression data, and this state is This continues until the pattern steps corresponding to the tone length data OD of the 0th step are repeated.

Then, note length counter OCO is set at 31201 in Figure 12.
If the value is determined to be O, S 1201-31202 again
-31215, the fill-in chord progression data of the next first step is read out, and sound generation processing is performed based on this.

The above operation is repeated while sequentially reading out each code step of the fill-in chord progression data.
At 216, when the last chord step of the fill-in chord progression data is read out, the tone length data OD is expressed as F'' in hexadecimal as described above, so it is 31.
The determination at step 216 is YES. This results in the following 312
At step 17, the progress register SR is returned to O, and the program returns to the main code progress mode.

Then, in 3121B, the chord counter CC is reset to O, and in 51205, the chord progression data of the 0th chord step of the main chord progression is read out, and from then on, the main chord progression is used.

An example of the above fill-in operation is shown in FIG. First, the rhythm pattern, bass pattern, and chord pattern are progressing in the main pattern as shown in the figure. Note that each break indicates a pattern step break every 16 steps. In addition, the chord progression data also progresses according to this chord progression. Each division indicates a division by a chord step containing 'F' as tone length data OD.In this state, the TI in the same figure
When a fill-in occurs at the timing of , the rhythm pattern etc. immediately changes to the fill-in pattern, but the chord progression data still maintains the main chord progression. Then, at the timing of T2, the rhythm pattern etc.
At the end of the 6 pattern steps, the rhythm pattern etc. returns to the main Bakun. On the other hand, the chord progression data forcibly changes to a fill-in chord progression at T2, and returns to the main chord progression after proceeding in the fill-in chord progression until the chord step break at T3.

In this way, the fill-in of rhythm patterns etc. takes precedence,
This is followed by a fill-in of chord progression data because it produces a musically natural effect. Note that by setting the number of chord steps of the fill-in chord progression data to be shorter than that of the main chord progression data, the fill-in effect can be enhanced. This can be done by inserting the end code "F" as the tone length data OD of an early chord step that does not reach the 31st step in the fill-in chord progression data shown in FIG.

The operation when the performer presses the ending 5W 1057 in FIG. 3 while the automatic accompaniment in the auto chord progression mode is being repeated through the loop from 5509 to S 518 in FIG. 5 will be described.

First, at the perfect timing of the main rhythm pattern of 16 chord steps, the ending 5W1057 is played.
When is pressed, in the various switching processes of 3518 in FIG. 5, the process proceeds to 31002-31016 in FIG.
7→S 1008→S 1009→51011, the counter values of note length counter OC and chord counter CC are reset to 0, and the value 3 is set in progress register SR. The process then proceeds to S1012, where the pattern change standby flag PTF is set to 0.

Due to the above operation, in the rhythm playback process of 3514 in FIG. 5, since the value of the pattern change standby flag PTF is 0, 5902→
The ending rhythm patterns are sequentially read out from pattern block 0 in the order of 5920→5921. Fifth
The same applies to the pace pattern and chord pattern in the bass playback process 3512 and the chord playback process 5513 in the figure.

On the other hand, in the auto chord progression process of 5511, S1201-31202-3120 in FIG.
3-31204, the determination in S1204 becomes YES, and the process proceeds to 5121.9. Here, the chord counter CCO counter value is calculated from the ending chord progression data corresponding to the rhythm number indicated by the rhythm number register RR among the ending chord progression data shown in FIG. A process of reading out the code step shown, that is, the 0th code step is performed. And after this, 31220→
31210→51211-31212-31213, and the 0th code step of the ending code progression data is set.

Below, it operates exactly the same as in the case of this chord progression data,
In the bass playback process 3512 and the chord playback process 5513 in FIG. 5, sound is produced using the scale and chord type based on the ending chord progression data.

Next, when the ending SW 1057 in FIG. 3 is pressed in the middle of the main rhythm pattern of 16 chord steps, in the various switching processes 8518 in FIG.
The process proceeds from S1002 to S1016 in FIG. 10, and the value 3 is set in the pattern register PR, and then S1007
- The process proceeds from S1008 to S1009 to S1010, and the pattern change standby flag PTF is set to 1.

As a result of the above operation, in the rhythm playback process of FIG. 5 8514, since the pattern change standby flag PTFO value is 1, S902 is performed as in the normal mode.
- S 920 - S 924 to read out the steps of the main rhythm pattern. The same applies to the base pattern and chord pattern in the bass reproduction process 3512 and the chord reproduction process 5513 in FIG.

On the other hand, in the auto chord progression process of 3511, since the value of the progression register SR is still O, indicating the main chord progression, reading of the above-described main chord progression data is continued. Therefore, in the bass playback process 3512 and the chord playback process 5513 in FIG. 5, the scale and chord type are specified and produced by the scale data OTD and chord name data CD of each chord step based on this chord progression data.

Then, the automatic accompaniment process by the loop from 5509 to 5518 in FIG. 5 is repeated, and when the value of Re2O3 in FIG. 1 reaches 15 at 3909 in FIG. . Since the value of the pattern register PR is 3 in Figure 10 S] and 016, the determination in 5911 is YES and 592
Proceed to step 5 and set note length counter OC and chord counter C.
The counter value of C is reset to 0, and the value 3 is set to the progress register SR. Then, the process advances to 5913 and the pattern change standby flag PTF is set to 0.

After the above process, in the rhythm playback process of FIG. 5 3514, since the value of the pattern change standby flag PTF becomes O, the process proceeds to S902-3920-3921, where the ending rhythm patterns are sequentially read out, and the fifth The same applies to the base pattern and chord pattern in the bass playback process 8512 and the chord playback process 5513 in the figure. In addition, in the auto chord progression process of 5511, S ]201-31202-3120 in FIG.
3-31204, the determination of 3120.1 becomes YES, and the process proceeds to 51219, where the ending chord progression data is read out. In the bass playback process of 3512 and the chord playback process of 5513 in FIG. 5, the scale is based on the ending chord progression data. - Pronunciation is performed depending on the chord type.

Then, the automatic accompaniment process is repeated through the loop from 5509 to 5518 in FIG. 5, and Rci in FIG.

When the value of 3 becomes 15, that is, when the next rhythm pattern to be sounded is the final 15 steps, it becomes 59.
The determination at step 22 is No, and at step 5923 the final step of the ending rhythm pattern is sounded.

After this operation, the process jumps from 5923 to the process of S1017 via the path shown in FIG. In addition, the ending chord progression is
Forced to end at the end of the ending rhythm pattern. Then, since the determination at 31017 in FIG. 10 is YES (the value of ACH is 1 in the autocode progression mode), various flags, counters, and registers are initialized at 51018 to 5IO23, and after that, the 11th The process jumps to steps 51105 and subsequent steps via the route marked with ■ in the figure, and the automatic accompaniment ends. After this process, 51105~
Repeat the process of 5i109 and start 5W1 in Figure 3.
054, intro SWI O53 or rhythm 5W105
Wait until one of 1 is pressed. Note that the initial settings of the rhythm number register RR and tempo data register TR are not performed, and when the start 5W1054 or the like is pressed next, automatic accompaniment starts at the rhythm number and tempo that have been used up until now. Further, in FIG. 11, since the autochord progression mode is on standby, the autochord progression flag ACR and the accompaniment flag BF remain as they were.

An example of the above ending operation is shown in FIG.

*In white, the rhythm pattern, bass pattern, and chord pattern progress according to this pattern as shown in the figure, and the chord progression data also progress according to this chord progression. Note that the meaning of each delimiter is the same as in FIG. 19. In this state, if ending occurs at timing T4 in the same figure,
Both the rhythm pattern, the bass pattern, and the chord pattern maintain this pattern until they reach the break of 16 pattern steps, and the chord progression data also maintains this chord progression accordingly. Then, when the rhythm pattern, etc. reaches the end of the 16-pattern sequence at the timing of 'r5, the rhythm pattern, etc. thereafter shifts to the ending pattern, and the chord progression data is also forced to shift to the ending chord progression at T5. . At timing T6, when the rhythm pattern and the like have finished sounding for 16 pattern steps, the automatic accompaniment process is terminated, and at the same time, the ending chord progression is also forcibly terminated.

In this case, the ending chord progression data does not actually require 32 chord steps as shown in FIG. 16, but it is sufficient to include the ending chord 1F' as the tone length data OD of several chord steps. Furthermore, the ending rhythm pattern of 16 pattern steps may be repeated several times to complete the ending rhythm pattern, and in this case, the ending chord progression data for 32 step steps may be entirely stored.

11 of the auto chord progression mode process of FIG. 5 3508
Through the loops 51106 to 31109 in the figure, the fifth
The operation when the performer presses the intro 5 WIO 53 in FIG. 3 to start the autochord progression process 5511 in the figure will be described.

In this case, first, the determination of 31106 in FIG. 11 is YES.
The program then proceeds to step 31113, where the value 2 is set in the pattern register PR and progress register SR, and the intro rhythm pattern mode is entered. After that, the start 5W
In the same way as when pressing 1054 (FIG. 3), the process proceeds to the auto-chord progression process of 5512 in FIG. 5 via 31110.

Hereinafter, by the loop of S509 to S5518 in Fig. 5,
The automatic accompaniment in auto chord progression mode is repeated, but
In the rhythm playback process of 5514 in FIG. 5, as in the normal mode, 5902-3926→S in FIG.
927-S By repeating the process of 906, automatic accompaniment starts with the intro rhythm pattern. Then, the automatic accompaniment with the intro pattern is repeated for 16 pattern steps, and when the value of Re2O3 (Fig. 1) reaches 15, the judgment of 3927 becomes YES, and 592
At step 8, the pattern register PR is set to 0 and a transition is made to the main rhythm pattern. The same applies to the base pattern and chord pattern in the bass reproduction process 5512 and chord reproduction process 3513 in FIG. 5.

Next, in the auto chord progression process of 5511, the value of the progression register SR becomes 2 by pressing the intro 5W1053, and since the value of the note length counter OC is 0 at the start as already explained, 12th
After the determination at 31201 in the figure becomes YES and the determination at S 1202 becomes NO, the determination at 51203 becomes YES and the process advances to S 1221. Here, among the intro chord progression data corresponding to the rhythm number indicated by the rhythm number register RR, the chord counter CC
A process is performed to read out the code step whose counter value is not indicated, that is, the 0th code step. 51216 after this
-31209→S 1210-31211. →S 12
12→S1213, and the 0th chord step of the intro chord progression data is set.

Below, it operates exactly the same as in the case of this chord progression data,
In the bass playback process 5512 and the chord playback process 5513 in FIG. 5, the scale and chord type are specified by the scale data OTD and chord name data CD of the 0th chord step based on the intro chord progression data, and this state is This continues until the pattern steps corresponding to the step's tone length data OD are repeated.

Then, at 51.201 in Figure 12, the tone length counter OC
If it is determined that (direct) is O, then SL201-31.
202→S1.203→S1221, the intro chord progression data of the next first step is read out,
Based on this, pronunciation processing is performed.

The above operation is repeated while sequentially reading out each code step of the intro chord progression data.
6, when the last chord step of the intro chord progression data is read out, the tone length data is 00 (see Figure 18).
is F'' in hexadecimal representation, so S 1216
The determination becomes YES.

As a result, the progress register SR is returned to 0 at the next step 31217, and the mode shifts to the main code progress mode. And 51
At 21B, the code counter CC is reset to O, and S
At step 1205, the chord progression data for the 0th chord step of the main chord progression is read out, and from then on, the main chord progression will be used.

An example of the above intro operation is shown in FIG. As shown in the same figure, at timing T7, intro 5WIO53 (Figure 3)
If you start with , the rhythm pattern, bass pattern, and chord pattern will start with the intro pattern, and the chord progression data will also start with the intro chord progression.

In this case, the rhythm pattern, etc. ends the intro pattern in 16 pattern steps and transitions to the main pattern at timing T8, but the chord progression data includes the chord 'F' as note length data OD (see Figure 18). The intro pattern is repeated until the chord step where is stored, and the main chord progression starts after timing T9.
The length of an intro such as a rhythm pattern and the length of an intro of chord progression data may be different. Note that, of course, the lengths can also be set to be the same.

The operation when the performer presses stop 5W1055 in FIG. 3 while the automatic accompaniment in the auto chord progression mode is being repeated by the loop 5509 to 5518 in FIG. 5 will be described.

In this case, in the various switching processes 3518 in FIG.
The judgment in Figure 1O 31.003 is YES, and 5101
Proceed to step 7. Then, since the determination of $1017 is YES (the value of ACR is O in the auto chord progression mode), the process proceeds to 51018. After this, ending 5W
The automatic accompaniment is ended in the same way as the automatic accompaniment ending process when 1057 (FIG. 3) is pressed.

Next, the operation of another embodiment of the present invention will be explained. In another embodiment described below, the fill-in SW 1.056 and intro SWI shown in FIG.
This relates to the operation when O53 is pressed. In this case, the operation flowchart of the rhythm playback process in FIG. 9 is replaced with that of the other embodiment shown in FIG. 22, and the operation flowchart of the autochord progression process of FIG. 12 is replaced with that of the other embodiment shown in FIG. Replaced. Hereinafter, in FIGS. 22 and 23, explanations will be given focusing on the parts with process numbers different from those in FIGS. 9 and 12.

First, regarding the operation of the other embodiment when the performer presses the fill-in 5W1056 in FIG. 3 while the automatic accompaniment in the auto chord progression mode is being repeated by the loop 5509 to 5518 in FIG. This will be explained along with the operation explanatory diagram of FIG. 24.

First, in Figure 24, when the rhythm pattern, bass pattern, and chord pattern are progressing according to the regular pattern as shown in the figure, and the chord progression data is also progressing according to the regular chord progression, the timing of the drawing IO When a fill-in occurs, in the rhythm playback process of 5514 in FIG.
Since the processing in →5906 is the same as in FIG. 9, the rhythm pattern etc. immediately changes to the fill-in pattern, but the chord progression data still maintains the regular chord progression.

This is similar to the operation at timing T1 in FIG. 19.

Next, when the rhythm pattern etc. reaches the break of 16 pattern steps at the timing of Tll in FIG. 24, as shown in FIG.
In the rhythm playback process of step 514, step S91 of FIG.
The processing in 5-3916 is the same as in Figure 9, and the value of the current progress register SR is 0, so the determination in 52201 is YE.
Since the processing from 5917 to 5919 is the same as that shown in FIG. 9, the rhythm pattern etc. returns to the main pattern from then on, and the chord progression data is forcibly changed to the fill-in chord progression at Tll. After that, 51202→S 1215→32301→S 122 in Fig. 23
0→S 1210 continues the fill-in chord progression. This process is performed from S1202→S in FIG.
1215→S 1216→S 1209→51210 Due to 0 or more, which is substantially the same as the processing, the processing at the timing T11 is the same as the operation at the timing shown in FIG.

However, after that, when the fill-in chord progression data reaches the chord steno knob break at timing TI2 in FIG. 24, in the embodiment shown in FIG.
Since the value of S230 was returned to 0, the program returned to the main code progression, but in the other embodiment shown in FIG.
At step 3, the readout of the fill-in chord progression data from the O-th code step is repeated again. Therefore, unlike the timing of T3 in FIG. 19, the timing of TI2 in FIG.
Then, the fill-in chord progression continues as is. This state is repeated until the player presses fill-in 5W1056 (FIG. 3) again.

Then, fill in swi at 713 in FIG.

When 56 is pressed again, the rhythm pattern etc. immediately changes to the fill-in pattern as before, and then the second
When the 16 pattern steps break at T14 in FIG. 4, the process returns to the main pattern through the processes 3915-3916 in FIG.

On the other hand, the chord progression data is 7 in Figure 24.
Even if the fill-in 5W 1056 is pressed at step 13, the value of the progress register SR does not change, so the fill-in code continues to progress. Then, when the rhythm pattern is divided into 16 pattern steps at 714 in Figure 24 and returns to the main pattern, 5915 → 5916 → 522 in Figure 22
01→S2202→52203-32204, and the value of the progress register SR is returned to 0. Therefore, for the first time, the chord progression data returns from the fill-in chord progression to the main chord progression.

As shown in FIG. 24, fill-in 5W1056
When (FIG. 3) is pressed once (TIO), the rhythm pattern etc. will first go into the fill-in state, and then, at the timing when the rhythm pattern returns to the main pattern (Tll), the chord progression will go into the fill-in state.

The fill-in state of the chord progression is maintained, and at the timing when fill-in 5W1056 is pressed again (
T13), the rhythm pattern etc. enters the fill-in state again, and then at the timing when the rhythm pattern returns to the main pattern (TI4), the chord progression data returns to the main chord progression.

The above operation allows the performer to freely control the duration of the fill-in chord progression. Note that for rhythm patterns, etc., it is better to return to the original pattern after 16 steps to obtain a better musical effect.

Next, when starting the autochord progression process 3511 in FIG. 5 through the loop 311.06 to 31109 in FIG. 11 of the autochord progression mode process 3508 in FIG. Regarding the operation of other embodiments when starting by pressing intro 5WI053,
This will be explained along with FIG. 25.

In this case, first, in FIG. 25, when the intro 5W1053 is pressed at timing T15, the value 2 is first set in the pattern register PR and progress register SR at 5ll13 in FIG. 11, as in the case of the previous embodiment. to enter intro rhythm pattern mode.

Hereinafter, the loop from 5509 to 5518 in FIG. 5 is repeated, but first, in the rhythm playback process at 5514,
S in Figure 22 902-3926 → 5927-3906
Since the processing is the same as in FIG. 9, automatic accompaniment starts with the intro rhythm pattern. That is, the processing at timing T15 in FIG. 25 is similar to the operation at timing T7 in FIG. 21. Then, the automatic accompaniment with the intro pattern is repeated for 16 pattern steps, and when the value of Re2O3 (Fig. 1) reaches 15 at the timing of T16 in Fig. 25, the processing from 5927 to 5928 in Fig. 22 is performed as shown in Fig. 9. Therefore, the pattern register PR is set to 0 in 5928 and the transition to the main rhythm pattern is made. This is similar to the operation at timing T8 in FIG. 19.

Next, in the auto chord progression process of FIG. 5 3511, the auto chord progression process of FIG.
Since the processing at 31209 is the same as that in FIG. 12, automatic accompaniment starts with the intro chord progression. Therefore, regarding the autochord progression processing, the processing at the timing 71.5 in FIG. 25 is the same as the processing at the timing 71.5 in FIG. 25.

However, when the intro chord progression data reaches the chord step break at timing 717 in FIG. 25, the determination in 51216 is Y in the embodiment shown in FIG.
After reaching ES, the value of the progress register SR was returned to 0 at 51217, so the main code progression was started, but the 23rd
In the other embodiment shown in the figure, after the determination at 31216 becomes YES, the value of the progress register SR does not change, and reading of the intro chord progression data from the Oth code step is repeated again at S2304. Therefore, T9 in FIG.
Unlike the timing shown in FIG. 25, the intro chord progression continues as it is at T17 in FIG. This state is
This process is repeated until the player presses fill-in 5W 1056 (FIG. 3) again.

Then, when the fill-in 5WI056 is pressed again at T18 in FIG. 25, the rhythm pattern etc. immediately shifts to the fill-in pattern as before, and when the 16 pattern steps break at T19 in FIG. The process returns to the main pattern through the processes 5915-5916 in FIG.

On the other hand, the chord progression data is T in Figure 25.
Even if the fill-in 5W 1056 is pressed at 1B, the value of the progress register SR does not change, so the intro chord progression continues. And the rhythm pattern is 7 in Figure 25.
19 marks the end of 16 pattern steps and returns to the main pattern, 5915→5916→5220 in FIG.
The process progresses from 1 to S 2202 to S 2204, and the value of the progress register SR is returned to 0.

Therefore, for the first time, the chord progression data returns from the intro chord progression to the main chord progression.

As shown in FIG. 25, <1. Intro 5WI053
When starting at (T15) as shown in FIG. 3, both the rhythm pattern and the chord progression data enter the intro state, and then at the timing of T16, the rhythm pattern returns to the main pattern. On the other hand, the intro state of the chord progression is maintained, and at the timing when the fill-in 5W1056 is pressed again (T18), the rhythm pattern etc. becomes the fill-in state again, and then at the timing when the rhythm pattern returns to the main pattern (T19), The chord progression data returns to the main chord progression.

The above operation allows the performer to freely control the duration of the intro chord progression.

〔Effect of the invention〕

According to the present invention, all difficult bass chord progressions are performed automatically, and the performer can switch from a normal chord progression to a special chord progression with a single touch with a simple switch operation, allowing a wide variety of chord progressions to be created. It becomes possible to specify.

In particular, in this case, each time the rhythm pattern becomes a special rhythm pattern, the chord progression data is alternately switched in conjunction with the special rhythm pattern, and the manner in which they are linked is controlled so that the accompaniment is musically effective. This allows even beginners to easily enjoy advanced automatic accompaniment.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention; FIG. 2 is an external configuration diagram of a keyboard section; FIG. 3 is an external configuration diagram of a switch section; FIG. 4 is a data configuration diagram of key information; 5 is a main operation flowchart, FIG. 6 is an operation flowchart for initial processing, FIG. 7 is an operation flowchart 11 for tempo processing, and FIG. 8 is an operation flowchart for initial rhythm switching processing. Figure 9 is an operational flowchart of rhythm playback processing, Figure 10 is an operational flowchart of various switching processes, Figure 11 is an operational flowchart of autochord progression mode processing, and Figure 12 is an operational flowchart of autochord progression processing. 13(a) to (1) are block diagrams of the flag/counter register group (FCR); FIG. 14 is a block diagram of the pattern memory unit;
) to (C) are data configuration diagrams of each pattern, Figure 16 is a configuration diagram of the chord progression memory section, Figure 17 is a data configuration diagram of tempo data, and Figure 18 is a data configuration diagram of each chord progression data. 19 is an explanatory diagram of fill-in operation, FIG. 20 is an explanatory diagram of ending operation, FIG. 21 is an explanatory diagram of intro operation, and FIG. 22 is an operational flowchart of rhythm playback processing in another embodiment. , FIG. 23 is an operational flowchart of autochord progression processing in another embodiment, FIG. 24 is an explanatory diagram of fill-in operation in another embodiment, and FIG. 25 is an explanatory diagram of intro operation in another embodiment. be. 101... Central control unit (CPU), 102... Timer clock, 103... Rhythm counter (RC), i04... Keyboard section, 105... Switch section, 106... Pattern memory section, 107...Chord progression memory section, -Chord judge section, -Accompaniment sound generation section, -Rhythm sound generation section1 Sound system. engineering,

Claims (1)

[Claims] 1) An automatic accompaniment device that generates rhythm tones based on a predetermined rhythm pattern and also generates bass tones and chord tones based on predetermined bass patterns and chord patterns to perform automatic accompaniment, rhythm pattern storage means for storing a normal rhythm pattern and at least one type of special rhythm pattern; selection means for selecting each of the special rhythm patterns; and during automatic accompaniment, the normal rhythm patterns are sequentially selected from the pattern storage means during normal times. Rhythm pattern control means for sequentially reading out the corresponding special rhythm patterns when a selection operation is performed by the reading and selecting means, and controlling the sounding timing of the rhythm sound based on the read rhythm pattern; and a normal code. chord progression storage means for storing progression data and at least one type of special chord progression data; and each time the special rhythm pattern is read out during automatic accompaniment, the chord progression data is read out from the chord progression storage means in conjunction with the readout operation. Chord progression data is alternately switched between the normal chord progression data and the special chord progression data and read out sequentially, and based on the read chord progression data, designation of the type of chord sound to be sounded in the chord pattern. and automatic chord progression control means for sequentially specifying pitches of bass notes to be produced in accordance with the bass pattern. 2) the normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is a fill-in rhythm pattern, the normal chord progression data is main chord progression data, and the special chord progression data is fill-in chord progression data; The selection means is a fill-in switch, and the rhythm pattern control means changes to the readout operation of the fill-in rhythm pattern when the fill-in switch is pressed during the readout operation of the main rhythm pattern, and the rhythm pattern control means changes to the readout operation of the fill-in rhythm pattern and performs a readout operation of the predetermined length. After reading the fill-in rhythm pattern, the automatic chord progression control means returns to the reading operation of the main rhythm pattern.
After the readout operation of the fill-in rhythm pattern is completed by the rhythm pattern control means during the readout operation of the main chord progression data, the readout operation of the fill-in chord progression data is changed to the readout operation of the fill-in chord progression data, and when the readout operation of the fill-in chord progression data is readout, the rhythm pattern control means 2. The automatic accompaniment apparatus according to claim 1, wherein the pattern control means returns to the reading operation of the main chord progression data after the readout operation of the fill-in rhythm pattern is completed. 3) The normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is an intro rhythm pattern and a fill-in rhythm pattern, the normal chord progression data is main chord progression data, and the special chord progression data is an intro chord progression. The selection means is an intro switch and a fill-in switch, and the rhythm pattern control means starts reading out the intro rhythm pattern and starts the automatic accompaniment when the intro switch is pressed at the time of starting the automatic accompaniment. When the intro rhythm pattern of a predetermined length is read out, the main rhythm pattern is read out, and if the fill-in switch is pressed during the main rhythm pattern readout operation, the fill-in rhythm is read out. After changing to the pattern reading operation and finishing reading the fill-in rhythm pattern of a predetermined length, the automatic chord progression control means returns to the main rhythm pattern readout operation, and the automatic chord progression control means controls the rhythm pattern control means to control the rhythm pattern control means when automatic accompaniment starts. At the same time as the readout operation of the intro rhythm pattern is started, the readout operation of the intro chord progression data is started, and the readout operation of the fill-in rhythm pattern is finished by the rhythm pattern control means at the time of the readout operation of the intro chord progression data. 2. The automatic accompaniment device according to claim 1, wherein the automatic accompaniment device moves to a reading operation of the main chord progression data.