JPH04243297A - Automatic accompaniment device of electronic musical instrument - Google Patents

Abstract

PURPOSE:To quality wise fulfill the performance of a solo pattern which automatically moves from a normal pattern performance while the keys on a keyboard are not being pressed and musical wise natural to make the transition between the normal pattern performance and the solo pattern performance. CONSTITUTION:As the performance patterns for an automatic accompaniment, plural number of normal patterns NORM 1 to 4, fill-in pattern FILL 1 to 4 and solo patterns SOLO 1 to 4 are independently provided. When nonpressed keys on the keyboard are continued more than a prescribed period during one of the normal patterns NORM 1 to 4 are being played, one of the patterns being played is shifted to one of the solo patterns SOLO 1 to 4 via fill-in patterns FILL 1 to 4. During one of the solo patterns SOLO 1 to 4 is being played, the pattern, which is being played, is shifted to one of the normal patterns NORM 1 to 4 in accordance with the keys being pressed on the keyboard. In these cases, the normal patterns NORM 1 to 4, which are being shifted, and the solo patterns SOLO 1 to 4 have a corresponding relationship to each other.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention stores accompaniment pattern data for each accompaniment style, such as march and rock, in an accompaniment data memory, reads out the accompaniment pattern data sequentially over time, and stores the accompaniment pattern data in accompaniment data memory. The present invention relates to an automatic accompaniment device for an electronic musical instrument that automatically generates accompaniment sounds such as chord constituent tones, bass tones, and percussion sounds based on the following.

0002

[Prior Art] Conventionally, this type of device has been used, for example, in the
As shown in Japanese Patent No. 0-28797, normal pattern data and a plurality of variation pattern data are prepared as accompaniment pattern data for each accompaniment style, and the normal and Balinese patterns specified by the selection switch are prepared in advance. The accompaniment sound based on the variation pattern data is used as an accompaniment for a key performance, and when no keys are played on the keyboard, the plurality of variation pattern data are sequentially switched and read out, and the accompaniment sound based on the same data is used as an interlude. ing.

0003

[Problems to be Solved by the Invention] However, in the conventional device described above, since the accompaniment sound based on variation pattern data is also used as accompaniment for key performance, the same pattern data is made to be significantly different from normal pattern data. The pattern data cannot generate rich performance sounds, and if the accompaniment sounds based on the variation pattern data are used as an interlude, the performance of the interlude sounds will be unsatisfactory. The present invention has been made to solve the above problem, and its purpose is to separately provide accompaniment pattern data used for accompaniment of key performance and accompaniment pattern data used for interlude. It is an object of the present invention to provide an automatic accompaniment device for an electronic musical instrument that is capable of generating rich interlude sounds and musically naturally transitions from the accompaniment for the key performance to the interlude.

0004

[Means for Solving the Problems] In order to achieve the above-mentioned object, the configurational features of the invention according to claim 1 include an accompaniment data memory storing accompaniment pattern data for each of a plurality of accompaniment styles; accompaniment style designation means for designating any one of the accompaniment styles; reading means for reading out accompaniment pattern data of the accompaniment style designated by the accompaniment style designation means; In the automatic accompaniment device for an electronic musical instrument, the accompaniment data memory includes a plurality of types of pattern data belonging to a first group and a second group as accompaniment pattern data for each accompaniment style. A first group of accompaniment pattern data designated by an accompaniment style designation means by controlling a reading means and storing a plurality of kinds of pattern data belonging to a group and corresponding to the plurality of kinds of pattern data, respectively; a pattern specifying means for reading out one of a plurality of types of pattern data belonging to the pattern; a non-pressed key detecting means for detecting that no key has been pressed for a certain period of time on the keyboard; and group switching means for controlling the reading means to start reading out one of the pattern data belonging to the second group corresponding to the pattern data in place of the pattern data belonging to the first group being read out. There is a particular thing.

[0005] A structural feature of the invention according to claim 2 is that, in addition to the structure of the invention according to claim 1, the accompaniment data memory further stores special pattern data as accompaniment pattern data. In addition, fill-in means is provided for controlling the reading means and reading out the special pattern for a predetermined period of time before the group switching means starts reading out the pattern data of the second group.

In addition to the configuration of the invention according to claim 1, a feature of the structure of the invention according to claim 3 is that, during reading of the pattern data of the second group, the reading means is controlled, A pattern sequential switching means is provided for sequentially switching and reading out one of the plurality of types of pattern data of the second group in a predetermined order at predetermined time intervals.

Furthermore, the structural feature of the invention according to claim 4 is that in addition to the structure of the invention according to claim 3,
While reading out the pattern data of the second group, the reading means is controlled in response to a key press on the keyboard, and instead of the pattern data belonging to the second group being read out, the pattern data corresponding to the same pattern data is replaced. The present invention is based on the provision of a group return means for shifting to one reading of pattern data belonging to one group.

[0008]

[Operations and effects of the invention] Claim 1 constructed as described above.
In the invention according to the above, when the key performance is normally performed, the pattern specifying means controls the reading means to select the accompaniment pattern data of plural kinds belonging to the first group, which is specified by the accompaniment style specifying means. One of the pattern data is read out, and the accompaniment sound signal generation means generates an accompaniment sound signal according to the read pattern data, so that the accompaniment sound signal generating means generates an accompaniment sound signal according to the read pattern data, so that the accompaniment sound signal generating means generates an accompaniment sound signal according to the read pattern data. An accompaniment tone signal corresponding to one pattern data specified by the pattern specifying means is generated together with a musical tone signal accompanying the key performance. Further, when the key performance is interrupted in this state, the group switching means controls the reading means in response to the detection by the non-key detecting means, and controls the pattern data belonging to the first group that has been read out. Instead, reading out one of the pattern data belonging to the second group that corresponds to the same pattern data is started, and the accompaniment sound signal generating means reads out the previous pattern data among the plurality of types of pattern data belonging to the second group. An accompaniment sound signal corresponding to pattern data corresponding to the pattern data belonging to the first group that has been read out is generated as an interlude. As can be understood from the above description, according to the invention according to claim 1, a plurality of types of pattern data of the first group are used as accompaniment for key performance, and a plurality of types of pattern data of the second group are used as an interlude. Since the data is used, the pattern data of each group can be distinguished, and the pattern data of the second group can be richer than the pattern data of the first group, making it possible to enrich the interlude. Furthermore, when transitioning from an accompaniment performance based on the first group of pattern data to an interlude based on the second group of pattern data, only transitions between corresponding pattern data are allowed.
The transition from accompaniment for key performance to interlude becomes musically natural.

Further, in the invention according to claim 2 configured as described above, the fill-in means controls the read-out means and waits for a predetermined period of time before the group switching means starts reading out the pattern data of the second group. Since only the special pattern stored in the accompaniment data memory is read out, a fill-in performance using the special pattern is inserted before transitioning from the accompaniment for the key performance to the interlude. As a result, according to the invention according to claim 2, in addition to the effect of the invention according to claim 1, a slight change is added to the performance pattern when transitioning to the interlude, making the performance richer. become.

[0010] Furthermore, in the invention according to claim 3 configured as described above, the pattern sequential switching means includes a second
While the pattern data of the group is being read, the reading means is controlled to sequentially switch and read out one of the plurality of types of pattern data of the second group in a predetermined order at predetermined time intervals, so that the performance pattern of the interlude is automatically changed. can be switched sequentially. As a result, according to the invention according to claim 3,
In addition to the effect of the invention according to claim 1, the interlude is rich in variety, and the interlude becomes fulfilling for a long time and does not get boring.

Further, in the invention according to claim 4 configured as described above, the group return means controls the reading means in response to a key depression on the keyboard while reading the pattern data of the second group, and Instead of the pattern data belonging to the second group that is being read out, one of the pattern data belonging to the first group that corresponds to the same pattern data is read out. An accompaniment sound signal is generated as an accompaniment to a key performance in accordance with pattern data that corresponds to the previously read pattern data belonging to the second group among the plurality of types of pattern data belonging to the second group. Become. As a result, according to the invention according to claim 1, in addition to the effect of the invention according to claim 3, the transition from the interlude based on the second group of pattern data to the accompaniment performance based on the first group pattern data is also possible. It becomes naturally natural.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows a block diagram of the entire electronic musical instrument according to the present invention. This electronic musical instrument includes a left keyboard 11, a right keyboard 12, and an operation panel 20. The left keyboard 11 consists of a plurality of keys and is used for playing chords. The right keyboard 12 also includes a plurality of keys and is used for playing melodies. The press and release of each of these keys is detected by opening and closing a plurality of key switches provided in the key press detection circuit 13 corresponding to each key.

The operation panel 20 includes a plurality of tone selection switch groups 21, a plurality of accompaniment style switch groups 22, a tempo volume 23, and a normal pattern specification switch group 2.
4. A solo switch 25, an auto solo switch 26, a start switch 27, and a stop switch 28 are provided.

The tone selection switch group 21 includes violin,
Each switch corresponds to a plurality of tones such as guitar, piano, etc., and each switch specifies one tone for a melody sound from among the plurality of tones. The accompaniment style switch group 22 corresponds to a plurality of accompaniment styles, such as march and rock, and each switch specifies one of the plurality of accompaniment styles. The tempo volume 23 is used to set the tempo of automatic accompaniment. The normal pattern switch group 24 consists of four switches, and four normal patterns NOR for each accompaniment style.
One of M1 to M4 (see FIG. 1) is specified. The solo switch 25 specifies forced switching from normal pattern performance to solo pattern performance. The auto solo switch 26 is used to designate an automatic switching mode from normal pattern performance to solo pattern performance. The start switch 27 instructs to start automatic accompaniment, and the stop switch 28 instructs to stop automatic accompaniment. The operation of each of these switches 21 to 28 is detected by a switch operation detection circuit 20a.

The key press detection circuit 13 and the switch operation detection circuit 20a are connected to a bus 30, and the bus 30 includes a musical tone signal forming circuit 40 and a microcomputer section 50.
and accompaniment data memory 60 are connected. The musical tone signal forming circuit 40 includes a plurality of musical tone signal forming channels, and each musical tone signal forming channel receives key codes KC, volume data VOL, key-on signal KON, etc. supplied from the microcomputer section 50 via the bus 30. Based on the control data, it forms melody sound signals and accompaniment sound signals with varying pitches such as piano and clarinet, as well as percussion sound signals such as drums and cymbals (defined as part of the accompaniment sound signal in this case). Form and output. The output of the musical tone signal forming circuit 40 is connected to a speaker 42 via an amplifier 41.

The microcomputer section 50 is connected to the bus 30
A program memory 51, a tempo clock generator 52, a CPU 53 and a working memory 5 respectively connected to the
Consists of 4. The program memory 51 is constituted by a ROM, and stores programs corresponding to the flowcharts shown in FIGS. 5 to 12. The tempo clock generator 52 is comprised of a variable frequency oscillator and is connected to the bus 30 from the CPU 53.
A tempo clock signal is generated at a cycle according to tempo control data supplied via the tempo clock signal. Note that the period of this tempo clock signal corresponds to the timing of dividing a quarter note into 24. After turning on the power switch (not shown), the CPU 53 continues to execute the "main program" corresponding to the flowchart shown in FIG. This interrupt executes an "interrupt program" corresponding to the flowchart shown. The working memory 54 is composed of a RAM and temporarily stores data necessary for executing the program.

The accompaniment data memory 60 is composed of a ROM, and includes a measure number table BART and a performance data table PLDT, as well as an area for storing other accompaniment data. The bar number table BART is
As shown in FIG. 3, the style number S representing the accompaniment style
It is divided into a plurality of areas specified by TLN, and each area has a section number SCTN (0 to
11) Measure number data BART (STL
N, SCTN) are stored. In this case,
The section number SCTN is common to each accompaniment style, and as shown in FIG.
8 to 11 represent each of the four sections belonging to the solo patterns SOLO1 to SOLO4 as the second group, and 4 to 7 represent each section of the fill-in patterns FILL1 to FILL4 as the third group. It represents. Measure number data BART (STLN, SC
TN) indicates the number of measures in one cycle of each pattern,
Normal pattern NORM 1 to 4 for each accompaniment style
For fill-in patterns FILL1-4, it is set to 1 bar, and for solo patterns SOLO1-4, it is set to 4-8 bars.

The performance data table PLDT is shown in FIG.
), each accompaniment style, each section (SC
TN=0 to 11), and is divided into storage areas PLDT (STLN, PTRN, TRKN) corresponding to each track, and each storage area PLDT (STLN, PTRN
, TRKN) are specified by a style number STLN, a section number SCTN, and a track number TRKN. In this case, the track number TRK
The number of tracks designated by N is 12 in total, and the same number TRKN represents a chord constituent tone sequence from 0 to 5, and is
6'' represents a bass tone sequence, 7 and 8 represent a percussion instrument tone sequence, and 9 to 11 represent a solo tone sequence. In addition, normal patterns NORM1 to 4 (SCNT=0 to 3) other than solo patterns SOLO1 to SOLO4 (SCTN=8 to 11) and fill-in patterns FILL1 to 4 (SCTN=4 to
In 7), tracks 9 to 11 for solo sounds are not prepared. Each storage area PLDT (STLN, PT
RN, TRKN), a series of performance data strings consisting of note data NOTE and tone color data TC are stored over time for each track. The note data NOTE is composed of a set of data consisting of an identification code, an event time EVT, and a key code KC, as shown in FIG. 4(B), and the tone data TC is composed of a set of data, as shown in FIG. 4(C). , identification code, event time E
It consists of a set of data consisting of VT and timbre number VOIN. In this case, the identification code indicates that one set of these data is note data NOTE or tone data TC, and the event time EVT indicates the read timing of each data NOTE and TC in terms of time from the beginning of each pattern. represent. In addition, the key code KC represents the pitch of the accompaniment sound as the number of semitone intervals from the C note based on the major chord (however, it represents the type of percussion instrument sound), and the tone number VOIN represents the timbre of the accompaniment sound ( However, for percussion instrument sounds, the same sound represents subtle changes). The accompaniment sounds based on the performance data strings stored in tracks 0 to 11 for each of these accompaniment styles are normal patterns NORM1 to NORM4 and fill-in patterns FILL1.
~4 and solo patterns SOLO1~4 (see Figure 1), as the section number SCTN increases, the musical excitement becomes larger (more colorful). 4,
8, section number 1, 5, 9, section number 2, 6
, 10 and section numbers 3, 7, and 11 are in a corresponding relationship, and transitions between the three patterns are musically natural.

[0019] In the area for storing other accompaniment data,
A chord detection table for detecting chords and a conversion table for converting accompaniment tones into constituent tones of the same chord based on the detected chords are provided.

The operation of the embodiment configured as described above will be explained below with reference to flowcharts. First, when the power switch (not shown) is turned on, the CPU 53 starts executing the "main program" at step 100 in FIG. Set. In addition,
In the initial setting process, the section number SCTN
is set to "0". After this initial setting, the CPU 53 continues to execute the circular process consisting of steps 104 to 110.

During the circulation process consisting of steps 104 to 110, when either the left keyboard 11 or the right keyboard 12 is pressed or released, the CPU 53 returns "YE" in step 104.
In step 106, the key event routine is executed. This “key event routine” includes steps 120-
142, and in this routine, the generation of melody sounds is controlled in accordance with the performances on the left keyboard 11 and right keyboard 12, and the played chords are detected.

[0022] When any key on the right keyboard 12 is pressed, the CPU 53 returns "Y" in steps 122 and 124.
ES" and executes key-on processing in step 126. In this key-on processing, a key-on signal KON representing a pressed key and a key code KC representing the name of the pressed key are output to the musical tone signal forming circuit 40, and the forming circuit 40 generates a tone pitch represented by the key code KC. A melody sound signal is formed, and the same signal is output to the speaker 42 via the amplifier 41. The timbre of this melody sound signal is determined by operating the timbre selection switch group 21 in a process described later. After the process of step 126, a routine consisting of steps 128 to 132 is executed, and this routine will be described when the automatic accompaniment sound generation operation is explained.

[0023] Furthermore, when any key on the right keyboard 12 is released, in steps 122 and 124, "YE
"S", "NO", and key-off processing is executed in step 132. In this key-off process, a key code KC representing the name of the released key and a key-off signal KOF are output to the musical tone signal forming circuit 40, and the forming circuit 40 stops forming the melody tone signal that is currently being generated. In this way, when any key on the right keyboard 12 is pressed or released, a melody sound is emitted from the speaker 4 in response to the same key pressed or released.
It is pronounced from 2. After the processing in step 134, if no key is pressed on the left and right keyboards 11, 12, a determination of "YES" is made in step 136, and the key-off time KOFT is initialized to "0" in step 138. be done. Further, if any key is being pressed on the left and right keyboards 11 and 12, the determination in step 136 is "NO";
The process of step 138 is not executed.

On the other hand, when any key on the left keyboard 11 is pressed or released, the CPU 53 determines "NO" in step 122, and executes chord detection processing in step 140, as described above. do. In this process, the left keyboard 11
A chord is detected by referring to the chord detection table in the accompaniment data memory 60 according to the combination of keys pressed in the key combination, and data representing the root note and type of the detected chord is stored in the chord root note CRT. and chord type CTP. After the process of step 140, processes of steps 136 and 138 similar to those described above are executed.

During the circulation process consisting of steps 104 to 110 in FIG. 6, if any switch or volume on the operation panel 20 is operated, the CPU 53
If "YES" is determined in step 108, step 1
At step 10, a "switch event routine" is executed. This "switch event routine" consists of steps 150 to 178, as shown in detail in FIG. Along with this setting, the generation of accompaniment sounds is controlled.

When any one of the timbre selection switches 21 is operated, the CPU 53 performs the determination process in step 152 and sends the timbre number data VOIN representing the operated timbre selection switch 21 to the tone signal forming circuit in step 154. Output to 40. As a result, the musical tone signal forming circuit 4
0 controls the timbre of the aforementioned melody sound.

If any of the accompaniment style switch groups 22 is operated, the CPU 53 stores the value representing the accompaniment style switch 22 operated in step 156 as a style number STLN through the determination process in step 152, and 158, the performance data storage area PLDT (STLN, PTRN,
0) to PLDT(STLN, PTRN, 11) are respectively set by the current timing CTIM. In this case, the current timing CTIM represents each progression timing obtained by dividing a quarter note into 24 in each pattern. Note that the process at step 158 is similar to step 1 in FIG. 7, which will be described later.
Although normally unnecessary in relation to the processing in step 72, even if the accompaniment style switch group 22 is operated during automatic accompaniment operation,
This is necessary in order to start automatic accompaniment based on the newly specified accompaniment style from the correct progression position.

When any one of the normal pattern switch groups 24 is operated, the CPU 53 determines in step 160 that the value (0 to 3) representing the operated normal pattern switch 24 is the section number SCTN. , and a pointer is set in step 158. Note that the processing in step 158 is normally not necessary, but if the normal pattern switch group 24 is operated during automatic accompaniment, automatic accompaniment based on the newly specified section number SCTN will be started from the correct progression position. It is necessary to do so.

[0029] When the tempo volume 23 is operated,
Based on the determination process in step 152, the CPU 53 executes a tempo setting process in step 162. In this tempo setting process, tempo control data corresponding to the operating position of the tempo volume 23 is transmitted to the tempo clock generator 5.
The generator 52 then outputs a tempo clock signal to the CPU 53 at a cycle corresponding to this tempo control data. Note that the period of this tempo clock signal corresponds to the timing of dividing a quarter note into 24.

When the auto solo switch 26 is operated,
Based on the determination process in step 152, the CPU 53 inverts the auto solo flag AS for each operation (changes from "1" to "0" or from "0" to "1") in step 164. In this case, the auto solo flag AS is “1”.
” sets the automatic accompaniment pattern to the left and right keys 11 and 12.
represents a mode in which normal patterns NORM1-4 are automatically switched to solo patterns SOLO1-4 according to the performance mode, and "0" represents a mode in which the switching is prohibited.

When the solo switch 25 is operated, the CPU
53 is determined in step 1 by the determination process in step 152.
At 66, a "solo switch routine" is executed. this"
As shown in FIG. 8, the "solo switch routine" consists of steps 180 to 192, and switches the automatic accompaniment pattern to solo patterns SOLO1 to SOLO4, the details of which will be described later.

When the start switch 27 is operated, C
Through the determination process in step 152, the PU 53 sets the run flag RUN to "1" in step 168, and sets the current timing CTIM to "0" in step 170.
In step 172, each pointer for each of the 12 tracks is set to the performance data storage area PLDT (STLN, PTRN, 0) for each track specified by the style number STLN and section number SCTN.
The start address value of PLDT (STLN, PTRN, 11) is initialized to start the automatic accompaniment operation. Further, when the stop switch 28 is operated, the CPU 53 sets the run flag RUN to "0" in step 174 according to the determination process in step 152, and sets the run flag RUN to "0" in step 1.
At step 76, a mute process is performed on the musical tone signal forming circuit 40 to stop the automatic accompaniment operation. The run flag RUN is "0" to indicate that automatic accompaniment is stopped, and "1" to indicate that automatic accompaniment is in operation.

Next, the automatic accompaniment operation based on the operations of the switches on the left and right keyboards 11, 12 and the operation panel 20 will be explained in detail. First, the case where the auto solo flag AS is set to "0" will be explained.

When the start switch 27 is operated, the run flag RUN is set to "1" as described above.
The current timing CTIM is initially set to “0”,
The pointers for each of the 12 tracks are also style numbers STL.
Performance data storage area PLDT (S
TLN, PTRN, 0) ~ PLDT (STLN, PTR
N, 11) is initialized to the start address value.

In this state, when the tempo clock generator 52 outputs a tempo clock signal to the CPU 53 at each timing of dividing a quarter note into 24, the CPU 53 outputs the ``main program'' (FIG. 5) at each timing. The execution is interrupted and the "interrupt program" is started to be executed in step 200 of FIG. 9, and "YES" is determined in step 202 based on the run flag RUN set to "1". -220 processes are executed. In this case, initially, the count timing CTIM is a small value, and the end timing of one pattern (BART (STLN, SCTN) x 96)
Since this has not been reached, the determination in step 204 is "NO", and the program proceeds to steps 208-216.

[0036] In this case, the section number SCTN is "0".
” to “3”, so the CP
U53 increments the variable i from "0" to "8" by "1" through the processes of steps 208, 212, 214, and 216, and executes the "reproduction routine" in step 210.
Execute repeatedly. This “playback routine” is shown in Figure 11.
As shown in detail in , execution starts in step 260, and in step 262, each storage area PLDT (STLN, PTRN,
i) 1 indicated by the pointer for each track from
The sets of performance data are sequentially read out, and the processing from step 264 onwards is executed.

In this case, if the event time EVT in the set of performance data is equal to the current timing CTIM and the same data is the note data NOTE, the determination is ``YES'' in both steps 264 and 266, and step 268 is performed. -272 processes are executed. Step 2
In steps 68 to 272, if the variable i is "6" or less, "NO" is determined in step 268, and step 2
At step 70, the key code KC constituting the read note data NOTE is a chord constituent note or base corresponding to the chord played on the left keyboard 11 based on the detected chord root note CRT and chord type CTP. The converted key code KC, key-on signal KON, and variable i are outputted to the musical tone signal forming circuit 40 in step 272. Also, the variable i is “
7” or “8”, the answer is “YES” in step 268.
”, and the read key code KC, key-on signal KON, and variable i are outputted to the musical tone signal forming circuit 40 in step 272. In this way, when the variable i is "7" or "8", the conversion process of step 270 is not executed because the variable i is "0" to "6", and the constituent notes of the chord and the bass note string are This is because "7" or "8" indicates a track of a percussion instrument tone sequence. Then, as mentioned above, the key code K
C, the key-on signal KON and the variable i are output to the musical tone signal forming circuit 40, and the musical tone signal forming circuit 40 generates the track specified by the variable i based on the key code KC, the key-on signal KON and the variable i. Since the accompaniment sound signal (chord constituent sound signal, bass sound signal, percussion instrument sound signal) is formed and output to the speaker 42 via the amplifier 41, the accompaniment sound signal consisting of the chord constituent sound, bass sound, and percussion instrument sound is output from the speaker 42. A series of accompaniment notes are sounded.

If the event time EVT in the set of performance data is equal to the current timing CTIM and the same data is the tone data TC, steps 264 and 26 are performed.
In step 274, the timbre number VOIN in the timbre data TC is determined as "YES" and "NO", respectively.
and variable i are output to the musical tone signal forming circuit 40. Then, the musical tone signal forming circuit 40 generates these tone numbers VOI.
Based on N and the variable i, the timbre of the accompaniment sound of the track specified by the variable i is set to the timbre specified by the timbre number VOIN.

After the processing of steps 272 and 274, the pointer of the track is advanced in step 276, and the program is returned to step 262 again, the next performance data of the same track is read, and the step 276 advances the pointer of the track. The processing after H.264 is executed. On the other hand, if the event time EVT is not equal to the current timing CTIM, the determination in step 264 is "NO", and the "reproduction routine" ends in step 278. As a result, the storage area PLDT (STLN, SCTN
, 0) to PLDT (STLN, SCTN, 8) are sequentially read out according to instructions from each pointer, and each time their event time EVT becomes equal to the current timing CTIM, The generation of musical tones and the timbre of the generated musical tones are controlled.

Returning again to the "interrupt routine" in FIG. 9, after the processing of steps 202 to 216, a "count routine" is executed in step 218. The “counting routine” is shown in detail in FIG.
Its execution begins at step 280 and step 28
By processing 2, Caleton timing CTIM is "1"
At the same time, in step 284, it is determined whether any of the keys on the left and right keyboards 11, 12 is being pressed. In this case, if either key on the left or right keyboard 11 or 12 is being pressed, "NO" is entered in step 284.
”, and the “count routine” ends at step 290. Also, if neither of the keys on the left and right keyboards 11 and 12 is being pressed, select "YES" in step 284.
If it is determined that the key-off time KOFT is less than "12 x 96" (the time corresponding to 12 measures) in steps 286 and 288, "1" is added to the same time KOFT, and in step 290 The routine ends.

In this way, when the automatic accompaniment starts operating by operating the start switch 27, the "interrupt program" is executed every time the tempo clock generator 52 generates a tempo clock signal (every time a quarter note is divided into 24). is executed, and according to the increase of the current timing CTIM, the style number STLN and section number SC
Normal pattern NORM corresponding to TN (=0 to 3)
Performance data PLDT (STLN, SCT
N, TRKN) (TRKN=0 to 8) are sequentially read out, and accompaniment sounds corresponding to the same data continue to be produced.

During the generation of such accompaniment sounds, the current timing CTIM increases and the same timing CTIM changes to the style number STLN and section number SCTN (=0
~3) When one pattern time of the accompaniment pattern specified by BART (STLN, SCTN) x 96 is reached, C
The PU 53 makes a "YES" determination in step 204 of FIG. 9, and executes an "automatic switching routine" in step 206. As shown in FIG. 10, this "automatic switching routine" starts its execution in step 230,
At step 232, the current section number SCTN is set to “
Since the current auto solo flag AS is set to "0" in step 234, the determination is "NO", and the step 2 is determined as "NO".
After processing steps 50 and 252, the "automatic switching routine" ends at step 254. These steps 250,
The process at step 252 is the same as step 172 in step 7 in FIG.
, 170, and through these processes, the performance data storage area PLDT (STLN, SCTN, i)
Each pointer (i=0 to 11) is set to an initial value (starting address value of each track), and the current timing CTIM is also set to an initial value "0". Since each process of the above-mentioned "interrupt program" (FIG. 9) is executed every time a tempo clock signal is generated, the normal patterns NORM1 to NORM4 are repeatedly read out, and a series of accompaniment sounds corresponding to the same pattern is generated. , are repeatedly sounded as accompaniment to the melody tones played on the right keyboard 12.

When the stop switch 28 is operated while this accompaniment tone is being generated, the run flag RUN is set to "0" as described above, the muting process for the musical tone signal forming circuit 40 is executed, and the automatic accompaniment is started. operation will stop.

Next, a case where the auto solo flag AS is set to "1" by operating the auto solo switch 26 will be explained. In this case as well, the left and right keyboards 11 and 12
If there is a key press operation in , accompaniment sounds according to patterns belonging to normal patterns NORM 1 to 4 (SCTN = 0 to 3) are produced, which is the same as when the auto solo flag AS is set to "0". be done.

However, when neither of the keys on the left and right keyboards 11 and 12 is pressed, step 13 in FIG.
6,138, the key-off time KOFT, which is initialized to "0" at the time when the last key is released, is changed from step 284 to step 284 of FIG. By processing 288,
Increase by "1". On the other hand, in this case, the section number SCTN is "0" to "3" and the auto solo flag AS is also "1", so one pattern time B
Step 232 of the "automatic switching routine" in FIG. 10, which is executed every ART (STLN, SCTN) x 96,
234, respectively, are determined as “NO” and “YES”,
Processing from step 236 onwards is executed. In this case, if the increasing key-off time KOFT is less than the time value 8 x 96 representing 8 bars, the step 236 indicates "NO".
'', the program proceeds to steps 250 and 252, and the accompaniment patterns belonging to the previous normal patterns NORM1 to NORM4 are repeatedly reproduced, as in the case described above.

On the other hand, when the state in which neither the left nor the right keys 11 and 12 are pressed continues, and the key-off time KOFT reaches a time value of 8×96 representing 8 measures, the section number SCTN changes from "0" to "3". ”, so step 236
, 238 are both determined as "YES", and step 2
At step 44, "4" is added to the section number SCTN. This results in section number SC as shown in Figure 1.
TN is "4" representing fill-in patterns FILL1 to FILL4
~ changed to "7". and steps 250, 25
2, the pointers for each of the 12 tracks are moved to the performance data storage areas PLDT (STLN, PTRN, 0) to PLDT (STLN, PTRN, 0) specified by the changed section number SCTN and the previous style number STLN.
TLN, PTRN, 11) are initialized to the start address value, and the current timing CTIM is also set to "0".
Since the section number is initially set to SCT,
Fill-in pattern FI represented by N (=4 to 7)
Accompaniment patterns belonging to LL1 to LL4 are played back. In addition,
In this case as well, by the process of step 214 in FIG. 9, a series of accompaniment sounds consisting of chord constituent tones, bass tones, and percussion sounds for nine tracks are produced from the speaker 42.

[0047] Such a fill-in pattern FILL1
~4 accompaniment is performed, and 1 pattern time B of the same pattern
When ART(STLN,SCTN)×96 has passed,
In step 204 of FIG. 9, the determination is "YES" again, and the "automatic switching routine" of FIG. 10 is executed. In this case, the section number SCTN is "4" to "7"
Therefore, the determination in step 232 of the same routine is ``YES'', and in step 244, ``4'' is added to the section number SCTN again, and the processes in steps 250 and 252 are executed. . As a result, as shown in FIG. 1, the section number SCTN is changed to "4" to "7" representing solo patterns SOLO1 to SOLO4, and the pointers for each of the 11 tracks are designated by the changed section number SCTN. Performance data storage areas PLDT (STLN, PTRN, 0) to PLD
T(STLN, PTRN, 11) is changed to the starting address value, and the current timing CTIM is also changed to “
0", so from then on, section number S
Solo pattern SO represented by CTN (=8 to 11)
Accompaniment patterns belonging to LO1 to LO4 are played back. In addition,
In this case, through the processing in steps 214 and 216 in FIG. 9, a series of accompaniment sounds consisting of 12 tracks of chord constituent tones, bass tones, percussion instrument tones, and solo tones are produced from the speaker 42.

Furthermore, neither the left nor the right keys 11 and 12 remain pressed, and the solo pattern SOLO continues.
1 to 4 1 pattern time BART (STLN, SCTN
)×96 has elapsed again, the "automatic switching routine" (FIG. 10) is executed, and "NO", "YES", "
YES”, “NO”, and “NO”, and through the processing of steps 250 and 252, the solo pattern SOL
O1-4 are played repeatedly.

[0049] Then, the state in which no key on the left and right keyboards 11, 12 is pressed continues, and the key-off time K
When OFT reaches a time value of 12×96 representing 12 bars, step 24 of the “automatic switching routine” (FIG. 10) is performed.
0 is determined as ``YES'', and in step 242, ``1'' is added to the current section number SCTN (=8 to 11). In this case, if the section number SCTN becomes "12" as a result of the addition, steps 246 and 248
Through the process, the section number SCTN is set to "8". After that, by processing steps 250 and 252, the pointer and current timing CTIM of each track are
is initially set, so the solo pattern SO to be played
LO1-4 are changed. The execution of this "automatic switching routine" is performed when the solo pattern SOLO1 is being played.
~4 1 pattern time BART (STLN, SCTN)
Since this is performed every ×96, as shown in FIG. 1, the accompaniment patterns belonging to the solo patterns SOLO1 to SOLO4 represented by the section numbers SCTN (=8 to 11) are sequentially switched and reproduced.

On the other hand, the solo pattern SOLO as described above
When the right keyboard 12 is pressed during the performance of accompaniment patterns belonging to accompaniment patterns 1 to 4, after the processing of step 126 in FIG. , and section number SCTN is “
8" to "11", and in step 130, "8" is subtracted from the section number SCTN, so that the same number SCTN becomes "0" to "3". This step 13
0, at step 132, similarly to the process at step 158 in FIG. 7, the performance data storage area PLDT (STLN, SCTN, i) (i=0 to 1
Each pointer in 1) is changed by the current timing CTIM. As a result, as shown in FIG. 1, the solo patterns SOLO1-4 (SCTN=8-11) being played are changed to normal patterns NORM1-4 (SCTN=0-3).

As is clear from the above explanation, when the auto solo flag AS is set to "1", normal patterns NORM1 to NORM4 (SCTN= 0 to 3) is being played, and if the playing of the left and right keys 11 and 12 is interrupted for 8 measures, the fill-in pattern FI
LL1-4 (SCTN=4-7) are inserted for one pattern time, and then solo patterns SOLO1-4 (SCTN=4-7) are inserted for one pattern time.
TN=8~11) starts to be played, and 1
If no keys are played on the left and right keyboards 11, 12 for two or more bars, the solo patterns SOLO1 to SOLO4 are sequentially and repeatedly played for each pattern time. Since these solo patterns SOLO1 to SOLO4 have a larger number of tones than other patterns and are more fulfilling, the listener will not get bored even if there is no keyboard performance. In addition, in this case, each normal pattern NORM1 to NORM4, fill-in pattern F
When switching between ILL1-4 and solo patterns SOLO1-4, the patterns are switched to corresponding patterns, so the switching of the patterns is musically natural. Furthermore, in the above state, if a key is pressed on the right keyboard 12,
Solo patterns SOLO1~4 are normal patterns NOR
The pattern is switched to M1 to M4, and at the time of this switching, the pattern is also switched to a corresponding pattern, so that the same pattern can be switched naturally musically.

Furthermore, as mentioned above, the normal pattern N
When the solo switch 26 is operated during the performance of ORM1-4 (SCTN=0-3) or fill-in patterns FILL1-4 (SCTN=8-11), the CPU 53 operates as shown in FIG. 7, regardless of the auto solo flag AS. Said step 1
66 processing is executed. This “solo switch routine”
As illustrated in FIG.
"8" is added to N, and the same number SCTN becomes "8" to "1".
1”, and the section number SCTN is set to “4” to “
7”, “4” is added to the same number SCTN, and the same number SCTN is set to “8” to “11”. Then, in step 190, the step 1 in FIG.
58, the performance data PLDT specified by the style number STLN and section number SCTN
(STLN, SCTN, i) Each pointer (i=0 to 11) is changed by the current timing CTIM. As a result, the pattern being played is a solo pattern SOLO.
1 to 4 (SCTN=8 to 11) or normal patterns NORM1 to 4 (SCTN=0 to 3), the solo patterns SOLO1 to 4 (SCTN=
0 to 3). In this case, if the auto solo flag AS is "1", the solo patterns SOLO1 to SOLO4 are switched as described above, and the normal patterns NORM1 to NORM4 are also restored by pressing a key on the right keyboard 12. However, if the auto solo flag AS is "0", the same solo patterns SOLO1 to SOLO4 are played repeatedly.

Furthermore, in the above embodiment, predetermined performance data is stored in the accompaniment data memory 60, but this memory 60 may be constructed from a RAM, and the player can write arbitrary data therein. You can do it like this,
It may also be possible to write arbitrary data from an external recording medium such as a magnetic tape or a magnetic disk.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing transition relationships of various patterns according to an embodiment of the present invention.

FIG. 2 is an overall block diagram of an electronic musical instrument equipped with an automatic accompaniment device showing one embodiment of the present invention.

3 is a data format diagram of a measure number table in the accompaniment data memory of FIG. 2; FIG.

4 is a data format diagram of a performance data table in the accompaniment data memory of FIG. 2. FIG.

5 is a flowchart of a "main program" executed by the microcomputer section of FIG. 2;

6 is a detailed flowchart of the "key event routine" of FIG. 5. FIG.

[Figure 7] “Switch event routine” in Figure 5
is a detailed flowchart.

8 is a detailed flowchart of the "solo switch routine" of FIG. 7. FIG.

9 is a flowchart of an "interrupt program" executed by the microcomputer section of FIG. 2. FIG.

10 is a detailed flowchart of the "automatic switching routine" of FIG. 9. FIG.

11 is a detailed flowchart of the "reproduction routine" of FIG. 9. FIG.

12 is a detailed flowchart of the “count routine” of FIG. 9. FIG.

[Explanation of symbols]

11...Left keyboard, 12...Right keyboard, 13...Key press detection circuit, 2
0...Operation panel, 22...Accompaniment style switch group, 24
...Normal pattern switch, 25...Solo switch, 2
6...Auto solo switch, 27...Start switch, 2
8... Stop switch, 40... Musical tone signal forming circuit, 50
...Microcomputer section, 60...Accompaniment data memory.

Claims (4)

[Claims] 1. An accompaniment data memory storing accompaniment pattern data for each of a plurality of accompaniment styles, accompaniment style designation means for designating any one of the plurality of accompaniment styles, and an accompaniment style designation means for designating one of the plurality of accompaniment styles; In an automatic accompaniment device for an electronic musical instrument, the automatic accompaniment device for an electronic musical instrument is equipped with a reading device for reading accompaniment pattern data of an accompaniment style that has been read out, and an accompaniment sound signal generating device that generates an accompaniment sound signal according to the read accompaniment pattern data. The memory includes a plurality of types of pattern data belonging to a first group as accompaniment pattern data for each accompaniment style;
A plurality of types of pattern data belonging to a second group and corresponding to the plurality of types of pattern data are respectively stored, and the accompaniment pattern data specified by the accompaniment style specifying means is controlled by the reading means. a pattern specifying means for reading out one of a plurality of types of pattern data belonging to the first group; a non-pressed key detecting means for detecting that no key is pressed for a certain period of time on the keyboard; A group that controls the reading means in response to the detection and starts reading out one of the pattern data belonging to the second group corresponding to the pattern data in place of the pattern data belonging to the first group being read out. An automatic accompaniment device for an electronic musical instrument, characterized in that it is provided with a switching means. 2. The accompaniment data memory further stores special pattern data as the accompaniment pattern data, and controls the readout means before the group switching means starts reading out the second group of pattern data. 2. The automatic accompaniment device for an electronic musical instrument according to claim 1, further comprising fill-in means for reading out the special pattern for a predetermined period of time. 3. The invention according to claim 1 further comprises controlling the reading means during reading of the pattern data of the second group to read one of the plurality of types of pattern data of the second group. 1. An automatic accompaniment device for an electronic musical instrument, comprising a pattern sequential switching means that sequentially switches and reads patterns in a predetermined order at predetermined time intervals. 4. The invention according to claim 3, further comprising: controlling the reading means in response to a key depression on a keyboard while reading the pattern data of the second group;
The electronic device is characterized in that it is provided with group return means for shifting to reading out one of the pattern data belonging to the first group corresponding to the read pattern data belonging to the second group instead of the read pattern data belonging to the second group. Automatic accompaniment device for musical instruments.