JPH0764559A - Automatic accompanying device for electronic instrument - Google Patents

Abstract

PURPOSE:To provide an automatic accompanying device in which an elaborate music performance with automatic accompaniment can be easily enjoyed even by a beginner, and one music can be performed by various keys. CONSTITUTION:'G, G#, A, A#, B, C, C#, D, D#, E, F, F#' are sequentially displayed on a first display area 30a as a 'key note selection candidate group'. Then, a part corresponding to an initialized key note is turned on. At the time of pressing the '+' key of a key note selection switch 10 once, a set key note is changed to 'C#', and the part which is turned on is moved to the position of the 'C#'. Thus, a performer can arbitrarily select the key note by the note selection switch 10 in addition to the initialized key note. Then, a code rotation processing and sounding processing can be executed based on the selected key note and code information, and the sounding of a music can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic accompaniment device provided in an electronic musical instrument such as an electronic organ and an electronic keyboard.

[0002]

2. Description of the Related Art Conventionally, electronic keyboard musical instruments such as electronic organs, which have a so-called automatic accompaniment device, have been widely used.
In this automatic accompaniment device, data of an accompaniment pattern of about several measures is stored in advance for each rhythm such as rock or waltz, and by a predetermined switch operation,
It is possible to automatically play an accompaniment consisting of chords (chords) and bass tones at a desired rhythm.

By the way, in such an automatic accompaniment apparatus, when a chord progression is added to the accompaniment (that is, when the chord of the accompaniment is changed according to the progression of a piece of music), the player depresses the keyboard during the performance. I had specified the code. That is, as shown in, for example, Japanese Unexamined Patent Publication No. 4-30198, the type of chord (for example, C, Dm, E from the key depression operation by the player).
_The chord information indicating the chord name ( _7, etc.) is detected, and the pitch data of the accompaniment pattern is changed based on the chord information to perform automatic accompaniment with a desired chord.

However, such a conventional automatic accompaniment apparatus has a problem that it is difficult for a beginner to perform, because it is necessary to perform with both hands. That is,
When playing a melody along with the automatic accompaniment, it is necessary to play the melody with the right hand while pressing the keyboard to change the chord with the left hand. Needed.

On the other hand, in addition to the above-mentioned automatic accompaniment device,
For some rhythms, data of short chord progressions of several bars was stored in advance. In this case, since the chord progression of the automatic accompaniment automatically changes based on the chord progression data, the performer only has to play the melody with one hand in accordance with this, and there is an advantage that even beginners can easily perform. .

However, in such a conventional automatic accompaniment apparatus, a typical chord progression is only repeated many times in units of a few bars, but instead of being easy to play, it lacks interest as a song and is rich in taste. There was a problem that I couldn't play. Then, in order to solve such a problem, the applicant of the present application discloses, in Japanese Patent Application No. 5-206414, code information and timing data of code change,
A storage unit is provided for storing chord progression data of automatic accompaniment for each piece of music, which is provided with pattern switching data for instructing switching of accompaniment patterns, and the accompaniment patterns are switched based on the chord progression data read from the storage unit. We proposed an automatic accompaniment device that performs one song complete automatic accompaniment with a predetermined chord progression.

With this device, the effect that even beginners can easily enjoy a musical performance with automatic accompaniment, which is rich in taste, was obtained, on the other hand, the keynote of the musical composition was decided for the chord progression. As a result, there is a new problem that it is not possible to meet the demand for playing with various keynotes.

The present invention has been made in order to solve this new problem, and even a beginner can easily enjoy a musical performance with automatic accompaniment, which is rich in taste, and can perform one music with various keys. An object is to provide an automatic accompaniment device for an electronic musical instrument.

[0009]

An automatic accompaniment apparatus for an electronic musical instrument according to the present invention, which has been made to achieve the above object, has an accompaniment pattern storage means M as shown in the basic configuration diagram of FIG.
In the automatic accompaniment apparatus for an electronic musical instrument, which automatically performs accompaniment with a predetermined chord, based on accompaniment patterns such as fill-in patterns and ending patterns stored in No. 1 and chord information indicating chord types, And chord progression data storage means M2 for storing chord progression data of automatic accompaniment for each music piece, which includes chord change timing data and pattern switching data for instructing switching of the accompaniment pattern, and a keynote arbitrarily. Based on the keynote selection means M3 for selecting, the keynote selected by the keynote selection means M3, and the chord progression data read from the chord progression data storage means M2, the accompaniment pattern is switched and selected. One song is completed in a predetermined chord progression based on the key note Automatic accompaniment processing means M to perform a dynamic accompaniment
4 is provided.

Here, as the accompaniment pattern, for example, a basic pattern that is normally played, an intro pattern that is played at the beginning of a song, a fill-in pattern that is inserted in the middle of the song, and an ending pattern that is played at the end of the song. Etc.

[0011]

In the automatic musical instrument playing apparatus of the present invention having the above-described structure, the accompaniment pattern storage means M1 stores accompaniment patterns such as an intro pattern, fill-in pattern, and ending pattern. The chord progression data storage means M2 includes a plurality of chord information indicating chord types, chord change timing data, and pattern switching data for instructing switching of accompaniment patterns. Progress data is stored. Moreover, the keynote can be arbitrarily selected by the keynote selecting means.

Then, the automatic accompaniment processing means M4 switches the accompaniment pattern based on the keynote selected by the keynote selecting means M3 and the chord progression data read from the chord progression data storage means M2, and the selected keynote. One song complete automatic accompaniment is performed with a predetermined chord progression based on.

That is, based on the chord progression data, for example, an automatic accompaniment of one song complete format is automatically performed with a predetermined chord progression, for example, a fill-in pattern is inserted in the middle of the intro pattern and ends with an ending pattern. The key note at that time can be arbitrarily selected by the performer. Therefore, 1
Even for accompaniment of music, for example, it is possible to set not only the initially set key note but another key note.

Therefore, the performer does not need to press the keyboard to change the chord of the automatic accompaniment, and can concentrate on the performance of the melody, so that even a beginner can easily enjoy the performance. Moreover, the automatic accompaniment performance is a one-track completion type in which the patterns such as fill-in and ending are automatically switched and the chord progression changes automatically, making the music interesting and rich in taste. You can enjoy. Furthermore, since the keynote can be arbitrarily selected by the player, one song can be played with various keys.

[0015]

Preferred embodiments of the present invention will be described below in order to further clarify the structure and operation of the present invention described above. Here, FIG. 2 is a block diagram showing an electrical configuration of the electronic keyboard 1 as an embodiment.

The electronic keyboard 1 of this embodiment is capable of performing automatic accompaniment based on accompaniment pattern data (described in detail later) such as a basic pattern, fill-in pattern, and ending pattern, which are stored in advance in a memory. The keyboard 3 is provided with a large number of white keys and black keys, a panel 17 provided with various switches, a speaker 26, and the like.

The appearance of the panel 17 is shown in FIG. Panel 1
7 includes a large number of switches 5 to 11 and a display unit 30 including an LCD or the like. Multiple switches 5
A power switch 5 for turning the power on and off, a number of rhythm selection switches 6 for selecting accompaniment rhythms, an accompaniment mode switch 7 for setting the "auto accompaniment mode" for automatic accompaniment, and an "automatic accompaniment mode" 11 are provided. In "accompaniment mode",
Furthermore, a chord progression mode switch 8 for selecting either the "automatic chord progression mode" or the "manual chord progression mode", a start switch 9 for instructing the start of automatic accompaniment, a keynote selection switch 10 for selecting a keynote, A tempo setting switch 11 for setting the tempo of automatic accompaniment is provided.

Here, the above-mentioned "automatic chord progression mode"
Is a mode in which an automatic accompaniment of one song can be performed. That is, in this mode, the start switch 9
Once you press to start the automatic accompaniment, the intro performance starts based on the automatic chord progression data (detailed later) stored in advance in the memory, and the chord progression changes automatically while the basic pattern accompaniment (specified The basic accompaniment by rhythm) is repeated, the fill-in pattern is inserted in the middle of the song, and the accompaniment automatically ends at the ending pattern.

Incidentally, the "manual chord progression mode" is a mode in which the performer presses the keyboard 3 and designates the type of chord, so that the accompaniment progresses the chord progression as in the conventional case. The items selectable by the rhythm selection switch 6 are, for example, "waltz", "march", "rock", "8 beats" and the like.

Among the above-mentioned switches, the power switch 5, the rhythm selection switch 6, the accompaniment mode switch 7, the chord progression mode switch 8 and the start switch 9 are in their operating states (power on, automatic accompaniment on, automatic chord on). An LED or the like is lit to indicate that the operation is on or to start, so that the player can recognize the presence or absence of the operation.

In the first display area 30a of the display section 30, a "keynote selection candidate group" for selecting a keynote by the keynote selection switch 10 is displayed.
Specifically, "G, G ^# , A, A ^# , B, C, C ^# ,
"D, D ^# , E, F, F ^# " are displayed in order. These are the keynotes (also called tonics and tonics) of the scale (scale), which are displayed for 12 octaves. Of the 12 keynotes displayed, only the currently set keynote is lit. Then, the keynote selection switch 10 can move the lighting portion to the left and right in order, and internally, by incrementing or decrementing the set numerical value, the keynote to be set can be arbitrarily selected. There is.

On the other hand, in the second display area 30b of the display unit 30, the tempo of the automatic accompaniment is displayed by a speed symbol. Specifically, the number of quarter notes played in one minute is displayed.
In the case of, it is “80”. The displayed number can be incremented or decremented by the tempo setting switch 11.

Returning to FIG. 2, the main control portion of the electronic keyboard 1 is a CPU 12 for performing various calculations, a RAM 13 for temporarily storing various data, a program memory (ROM) 14 for storing control programs, and an accompaniment described later. A nonvolatile accompaniment pattern data memory 15 for storing pattern data, a nonvolatile automatic chord progression data memory 16 for storing automatic chord progression data, which will also be described later, and a keyboard 3.
Keyboard interface 20 to which is connected, each switch 5
To 11 and the display unit 30 are connected to a panel interface 21, a tone signal generation circuit (sound source) 22 and the like,
These are connected to each other via a data bus 23.

Here, the keyboard interface 20
Is a circuit for detecting key depression and key release for each key on the keyboard 3, and the panel interface 21 detects the on / off state of each of the switches 5 to 11 and outputs a display signal to the display unit 30. It is a circuit for doing.

The tone signal generation circuit 22 has a plurality of parallel tone generation channels and outputs a voice signal based on the tone generation data input to each channel via the data bus 23. A speaker 26 is provided in the tone generation circuit 22 via an amplifier 25 that amplifies an audio signal output.
Are connected.

Next, the structure of the accompaniment pattern data stored in the accompaniment pattern data memory 15 will be described in detail. As shown in FIG. 4, the accompaniment pattern data is
For each rhythm such as rock or waltz, the performance data of the basic pattern (basic pattern data; for example, 4 measures), the performance data of the intro pattern played at the beginning of the song (intro data, for example, 2 measures), Performance data of a fill-in pattern (fill-in data; for example, one measure) inserted in the middle, and performance data of an ending pattern (ending data; for example, two measures) to be performed at the end of the music are provided. These data are provided with performance data for each part such as piano, strings, bass, etc.

Here, the detailed data structure will be described by taking the basic pattern data as an example. As shown in FIG. 5, 1 part (4 measures) of data has a 1-byte [Tone Data] indicating the tone color of the part at the beginning, followed by 1
Pronunciation data (4 bytes) that specifies the pronunciation for each note
Are sequentially stored for each pronunciation. This pronunciation data is the [KEY N
O.], [Step] (0-48) that indicates the timing of pronunciation,
It is composed of data such as [Gate] indicating the length of pronunciation and [Velocity] indicating the strength (volume) of the pronunciation. In addition, after a plurality of pronunciation data, bar end data [Bar Mark] is placed for each bar of a bar, and pattern end data [End Mark] indicating the end of the data is placed at the end of the data of one part. Will be placed.

The intro data, fill-in data, and ending data (see FIG. 4) have substantially the same structure as the basic pattern data shown in FIG. Next, the structure of the automatic chord progression data stored in the chord progression data memory 16 (see FIG. 2) will be described in detail.

As shown in FIG. 6, the automatic chord progression data is data for one music piece of an accompaniment of one music piece complete format, and is provided for each rhythm. At the beginning of the automatic chord progression data, intro switching data [Intro Mark] for designating the intro pattern from the accompaniment pattern data (see FIG. 4) and playing the intro pattern is arranged. A plurality of 2-byte chord data for arranging the accompaniment chords are arranged according to the progression of the song,
Form chord progression data. This code data is
It is composed of code information [Chord Name] indicating the type of code (code name such as C, Dm, E ₇ etc.) and [Step] which is the code change timing.

At the end of one bar, bar end data [Bar Mark] is arranged, and further, fill-in switching data (fill-in) for switching the accompaniment pattern data to fill-in data in the middle of the music and playing the fill-in pattern. [Fill Mark] indicating the switching to [1] and [Step] indicating the switching timing) are arranged. At the end of the data for one song, song end data [End Mark] indicating the end of the data is arranged.

The chord progression in the automatic chord progression data for one piece of music is preferably a typical chord progression that matches the rhythm to which the data belongs. That is, for example, in the case of waltz automatic chord progression data, it is preferable that the chord progression has a musical tone like waltz.

Next, the control processing performed by the electronic keyboard 1 of the present embodiment having the above configuration will be described in detail with reference to the flowcharts of FIGS. In the electronic keyboard 1 of this embodiment, the main routine shown in FIG. 7 and the interrupt processing shown in FIG. 8 are mainly performed.

First, the main routine of FIG. 7 will be described in detail. This routine is started and always executed when the power switch 5 is turned on.
Initialization processing such as clearing AM 13 (see FIG. 2) is performed (step 11. The step will be simply referred to as S hereinafter),
Prepare for subsequent processing.

Next, the other switches 6 to 11 on the panel 17
A panel scanning process for detecting the on / off state (see FIG. 3) is performed (S13), and it is determined whether the keynote selection switch 10 has been operated (S15). When the keynote selection switch 10 is not operated, the process directly proceeds to S19, and when the keynote selection switch 10 is operated (S15: YES), the keynote change process is performed according to the operation (S17).

Here, the keynote changing process of S17 will be described. As described above, in the first display area 30a (see FIG. 3) of the display unit 30, “G, G ^# , A, A ^# , B, C, C ^# , D,” is displayed as the “keynote selection candidate group”.
"D ^# , E, F, F ^# " are displayed in order. Then, the part corresponding to the default keynote is lit. In FIG. 3, the keynote “C” is set as the initial setting, and the state in which the part is lit is shown by diagonal lines. Then, "+" of the keynote selection switch 10
When the key is pressed once, the setting keynote is changed to "C ^# " as the processing of S17, and the lighting portion in the first display area 30a is also moved to the "C ^# " position. Further "+"
As you press the key, the lighting position will change from D to D ^{# with} each press.
→… and move. Of course, the set keynote will also change. Similarly, when the "-" key is pushed, the lighting position moves in the order of B-> A ^#- >A-> ... Of course, the set keynote will also change.

Returning to FIG. 7, in S19, a keyboard scanning process for detecting key depression and key release of the keyboard 3 is performed. It should be noted that, according to the information of key depression and key release detected by the keyboard scanning process, the speaker 26 can be operated like a conventional electronic keyboard.
(See FIG. 2) It is possible to generate and mute musical tones.

Next, it is judged whether or not the "auto accompaniment mode" is set by the accompaniment mode switch 7 (S
21) If a negative decision is made, the process returns to S13 and the above S13 to S19 are repeated. On the other hand, if an affirmative judgment is made in "automatic accompaniment mode" in S21, it is determined whether or not the automatic accompaniment is currently being performed (that is, the state where the start switch 9 is pressed and the automatic accompaniment is started). Judge (S2
2). If a negative determination is made here, the process directly returns to S13, but if an affirmative determination is made that the automatic accompaniment is being performed, it is subsequently determined whether or not the "automatic chord progression mode" is currently set (S23). If an affirmative decision is made here,
Then, the following processing (S27, S29) is executed to
Perform an automatic accompaniment in the form of song completion. That is, in the automatic chord progression data processing of S27 (see the flowchart of FIG. 9), the automatic chord progression data is read and processed. Then, the accompaniment pattern data processing (see the flowchart of FIG. 10) to be described later in S29 reads out the accompaniment pattern data, and performs processing such as chord turning and sound generation based on the previously read and processed automatic chord progression data.
Perform an automatic accompaniment to complete the song. The automatic chord progression data processing (FIG. 9) and the accompaniment pattern data processing (FIG. 10) will be described in detail later.

If it is determined in the above S23 that the automatic chord progression mode is not in effect (that is, in the "manual chord progression mode"), the procedure proceeds to S28 to detect the chord information, and then in S29. Performs accompaniment pattern data processing. In other words, in the "manual chord progression mode", a part of the keyboard 3 (generally, a low-pitched (lower) key is assigned) is assigned to a chord progression designation part, and is pressed in the designation part. From key operations, code information [Chord Na
me] is detected. Then, in S28, the chord information is detected, and accompaniment pattern data processing is executed based on the chord information. Therefore, as in the conventional case, the performer gives a chord progression to the accompaniment by depressing the keyboard and designating the type of chord. In this case, the performance of the basic pattern is repeated.

Next, the interrupt processing of FIG. 8 will be described in detail. This interruption processing is executed at predetermined time intervals according to conditions such as the tempo of the performance (set by the tempo setting switch 11 in FIG. 2) and the like. , The step count value “n”, which serves as a reference for the timing of the fill-in insertion and the like, is added.

In this processing, first, it is judged whether or not the automatic accompaniment is currently being performed (S31), and if a negative judgment is made,
The process directly returns to the main routine (FIG. 7), but if a positive determination is made, 1 is added to the step count n (n = n +
1) (S33). The value of n is reset to 0 when the automatic accompaniment is started.

Then, in the following S35, it is determined whether or not the step count n is equal to a predetermined value N, and if a negative determination is made, the process directly returns to the main routine. On the other hand, S35
If the affirmative judgment is made, that is, the step count n =
When the value reaches the predetermined value N, the step count n is reset to 0 (S37) and the process returns to the main routine.

Here, the predetermined value N is determined according to the number of times the step count n is counted during one bar. That is, for example, with a time signature of 4/4, 1 / of a quarter note
When the step count is added every 12 hours (that is, when one bar is divided into 12 × 4 = 48 equal parts), the step count n is counted from 0 to 48 (= N), and N =
When it reaches 48, the step count n is reset to 0 in S37 of the interrupt process of FIG. 8 to indicate the end of one bar (that is, the start of the next bar).

Then, S27 of the main routine (FIG. 7)
Figure 9 shows the automatic chord progression data processing performed in
It will be described in detail based on the flowchart of FIG. In this process, first, the automatic chord progression data for each song (FIG. 6) is sequentially read from the beginning of the data for each section such as intro switching data and sounding data (S41). Here, the automatic chord progression data corresponding to the rhythm set by the rhythm setting switch 6 (see FIG. 3) is read.

Next, it is judged whether or not the data read out in S41 is intro switching data (S43). If a positive judgment is made, the accompaniment pattern data read out later is introduced to perform an intro performance. The data is switched (S45), and the pointer for designating the address of the read data is advanced (S47) in preparation for the next read of the automatic chord progression data. That is, when this process is executed next time, the data of the next section is read. On the other hand, if a negative decision is made at S41 that the data is not intro data, the pointer is not advanced and the process proceeds directly to S49.

Next, in S49, it is determined whether or not the data read in S41 is code data. If a negative determination is made here, the process directly proceeds to S57, but if an affirmative determination is made that the data is code data, it is determined whether or not [Step Time] of this code data and the current step count n match ( S51). Here, if a negative determination is made, the process directly proceeds to S57, but if a positive determination is made,
Code information currently stored in a predetermined area of the RAM 13 (indicating so-called code names such as C, Dm, E ₇ etc.)
Is updated to the code information [Chord Name] of this code data and stored (S53), and the pointer is incremented (S55).

Next, in S57, it is determined whether or not the data read in S41 is fill-in switching data. If a negative determination is made here, the process proceeds directly to S65, but if an affirmative determination is made, it is determined whether [Step] of the fill-in switching data and the current step count n match (S59). If a negative determination is made in S59, the process proceeds directly to S65, but if an affirmative determination is made, it is the performance timing of the fill-in pattern.
The accompaniment pattern data read later is switched to fill-in data (S61), and the pointer is incremented (S63).

Next, in S65, it is determined whether or not the data read in S41 is bar end data [BarMark]. If a negative determination is made in S65, the process directly proceeds to S71, but if an affirmative determination is made, it is determined whether or not the current step count n is 0 (S67). If a negative determination is made in S67 (that is, in the middle of a bar), the process proceeds to S71 as it is, but if an affirmative determination is made (that is, the end timing of the bar), the pointer is incremented (S69). .

Next, in S71, it is determined whether or not the data read in S41 is music end data [End Mark]. If a negative determination is made in S71, the process is temporarily terminated and the process returns to the main routine, but if an affirmative determination is made, it is determined whether or not the current step count n is 0 (S73). If a negative determination is made in S73 (that is, in the middle of a bar), the process immediately returns to the main routine, but if an affirmative determination is made, the accompaniment pattern data is switched to ending data (S75), and the main routine (FIG. 7). ) Return to.

As described above, in the automatic chord progression data processing, the chord data of the automatic chord progression data and the data (fill-in switching data etc.) for instructing the switching of the accompaniment pattern are sequentially read to update the chord information, The accompaniment pattern data to be read is switched from the basic pattern data to fill-in data, ending data, or the like.

Then, S29 of the main routine (FIG. 7).
The accompaniment pattern data processing executed in step S10 will be described in detail with reference to the flowchart of FIG. In this process, first, the accompaniment pattern data (see FIGS. 4 and 5) corresponding to the rhythm selected by the rhythm selection switch 6 (see FIG. 3) is divided into sections such as pronunciation data and bar end data. The data is sequentially read from the beginning (S81).
The data read here is usually basic pattern data, but S4 of the automatic chord progression data processing described above is used.
When the data read out in S3 or S75 is switched, the intro data, fill-in data or ending data is read.

Next, it is determined whether or not the data read out in S81 is sound generation data (see FIG. 5) (S8).
3). If a negative determination is made in S83, S91 is directly executed.
If it is affirmatively determined that the data is sound data, it is determined whether [Step] of this data and the current step count n match (S84). If a negative determination is made in S84, the process directly proceeds to S91, but if an affirmative determination is made, it is the timing of sound generation.
85) is performed, and then a tone generation process (S87) is performed to generate a tone. After that, the pointer designating the read data is incremented (S89) to S91.

That is, in the code turning process of S85, R
If the current chord information stored in the AM 13 (updated and stored in S53 of the automatic chord progression data processing shown in FIG. 9) and the keynote change in S17 of FIG. Change [KEY NO.] (Pitch data) of the read pronunciation data based on the subsequent key note. For example, if the keynote of the default automatic chord progression data is "C" and it is set to "D" by the keynote selection switch 10,
All the pitches are increased by one note with respect to the pitch in the initial setting. Further, when set to "B", the pitch decreases by a semitone for all the pitches in the initial setting.

Then, in the pronunciation processing of S87, this [KE
Y NO.] Is changed to generate the musical tone generation circuit 22
(See Fig. 2) Assign to the specified channel and input,
An audio signal output from the tone generation circuit 22 is amplified by an amplifier 25 in accordance with the sound generation data, and a sound of accompaniment is sounded from a speaker 27.

In the part (for example, piano) which is in charge of the accompaniment of chord sounds in the accompaniment pattern data, the pronunciation data of each note constituting the chord sound is stored, and each of these plural pronunciation data is stored. On the other hand, chord turning and tone generation processing are performed, and a chord tone corresponding to the current chord information is played. Also, when there is a bass part, the chord inversion process is similarly performed, and the bass performance is performed at a pitch according to the chord information.

Returning to FIG. 10, next, in S91, S
The data read in 81 is the bar end data [Bar Ma
rk]. If a negative determination is made in S91, the process directly proceeds to S97, but if an affirmative determination is made in S91, it is determined whether or not the current step count n is 0 (S93). If a negative determination is made in S93 (that is, in the middle of a bar), the process proceeds to S97 as it is, but if an affirmative determination is made (that is, the end timing of the bar), the pointer is incremented (S95). .

Next, in S97, it is determined whether or not the data read in S81 is part end data [End Mark]. If a negative determination is made here, the part (see FIG. 4) of the accompaniment pattern data to be read in the next process is switched (S98), the process is temporarily terminated, and the process returns to the main routine.

On the other hand, if a negative determination is made in S97, the process is temporarily terminated and the process returns to the main routine, but if an affirmative determination is made, it is determined whether or not the current step count n is 0 (S99). ). If a negative determination is made in step S99 (that is, if it is in the middle of a measure), the process directly returns to the main routine, but if an affirmative determination is made (if it is the end of a measure), the read accompaniment pattern data The type (see FIG. 4) is determined (S100). Then, depending on the type, the following processing (S101, S103, S1
After performing 05), the process returns to the main routine.

That is, when the read data is the basic pattern data, the read address of the data is returned to the head (S101), and the process returns to the main routine. That is, next time, the basic pattern data is read again from the beginning, and the basic pattern performance is repeated.

On the other hand, if the read data is intro data or fill-in data, the data to be read next time is switched to the basic pattern data (S103).
That is, immediately after the intro or fill-in performance is finished, the basic pattern performance is immediately resumed.

If the read data is the ending data, the accompaniment for one piece of music is finished, and the flag indicating that the automatic accompaniment is being performed is cleared to set the automatic accompaniment end state (S105). In this state, a negative determination is made in S21 of the main routine (FIG. 7) that automatic accompaniment is not in progress.

Next, a specific example of performance of the automatic accompaniment of one song complete format in the electronic keyboard 1 of the present embodiment as described above, a flowchart of the main routine of FIG. 7 and FIG.
It will be described based on the explanatory diagram of FIG. Here, alphabetical symbols (E, A, E _7, etc.) in the explanatory diagram of FIG. 11 are chord names indicating chord progressions during performance.

First, before starting the one-track complete accompaniment style, the performer selects a desired rhythm with the rhythm selection switch 6 (see FIG. 3) and sets the "auto accompaniment mode" with the accompaniment mode switch 7. Then, the chord progression mode switch 8 is set to the "automatic chord progression mode".

When the start switch 9 is pushed, 1
The music completion type automatic accompaniment is started, and the intro switching data at the head of the automatic chord progression data is read out at S27 (automatic chord progression data processing) of the main routine shown in FIG. processing)
Since the intro data is read at, the intro pattern is played (for two bars) as shown in FIG.

Next, when the performance of this intro pattern ends (that is, when the reading of the intro data is performed up to [End Mark]), the accompaniment pattern data read in S29 of the main routine shown in FIG. 7 is the basic pattern data. The performance of the basic pattern (for four measures) is repeated several times as shown in FIG.

During the performance of this automatic accompaniment, based on the chord information [ChordName] of the automatic chord progression data,
Since the accompaniment pattern data is processed for chord inversion (see FIG.
(See S85 during processing of accompaniment pattern data of 0), FIG.
As shown in, the chord during the automatic accompaniment is automatically changed for each measure from the beginning of the intro pattern performance to A → E → A → ... (that is, chord progression is automatically added). .

While the chord is automatically changed in this way, the performance of the basic pattern is repeated and the accompaniment progresses. However, in S23 of the main routine shown in FIG. 7, the fill-in switching data of the automatic chord progression data is changed. When read, the accompaniment pattern data read in S25 is switched to fill-in data, and as shown in FIG.
A fill-in pattern performance (1 bar) is inserted.
When the performance of the fill-in pattern is completed, the basic pattern performance is resumed.

When the music end data [End Mark] of the automatic chord progression data is read in S27 of the main routine, the accompaniment pattern data read in S29 is switched to the ending data, and as shown in FIG. The ending pattern is played (two measures), and the accompaniment of one song completes automatically.

If the player plays a melody or the like on the keyboard 3 in accordance with the accompaniment as described above, the performance by the keyboard 3 is sounded from the speaker 26 together with the automatic accompaniment.
As described in detail above, in the electronic keyboard 1 of the present embodiment, the accompaniment pattern data memory 15 stores accompaniment pattern data such as fill-in patterns and ending patterns, and the automatic chord progression data memory 1
6 stores in advance automatic chord progression data for one song, which includes a plurality of chord data indicating chord types and chord change timings, and data (fill-in switching data, etc.) for switching accompaniment patterns. . Then, by operating the keynote selection switch 10, the keynote can be arbitrarily selected.

Therefore, the player does not need to press the keyboard 3 to change the chord of the automatic accompaniment, and can concentrate on the performance of the melody and the like, so that even a beginner can easily enjoy the performance. Moreover, the automatic accompaniment is a one-track complete type in which chord progression changes automatically and patterns such as fill-in and ending are automatically switched. It doesn't repeat endlessly with the chord progression of
You can enjoy an interesting performance as a song. Further, since the player can arbitrarily select the keynote, it is possible to set another keynote in addition to the initially set keynote even if the accompaniment of one piece of music.

That is, according to the electronic keyboard 1 of this embodiment, the uniqueness of the performer can be reflected and one song can be played by various keys. In the above embodiment, the accompaniment pattern data and the automatic chord progression data are provided for each rhythm name such as rock, waltz, etc. Therefore, for each rhythm, the automatic accompaniment of the one-song completion type as described above is performed. You can enjoy

Although the embodiments have been described above, the present invention is not limited to the above embodiments and can be implemented in various modes. For example, the accompaniment pattern data is not limited to fill-in data, ending data, etc. in the above embodiment, and various accompaniment pattern data may be provided.
For example, data of an accompaniment pattern (about four measures) that is more flashy than the basic pattern is prepared, and the exciting part (so-called chorus part) in the accompaniment that completes one song is based on the automatic chord progression data. Then, the performance may be switched to this flashy accompaniment pattern.

Regarding the automatic chord progression data,
For each rhythm, a plurality of data in units of one tune (that is, data with different tunes) with different chord progressions, fill-in pattern insertion timings, etc. may be provided. For example, with regard to chord progressions, data having major (major) chord progressions, data having minor (minor) chord progressions, etc. are prepared so that the performer can appropriately select data having different musical tones. You may

[0073]

As described above in detail, according to the automatic accompaniment apparatus for an electronic musical instrument of the present invention, the performer does not need to press the keyboard to change the chord of the automatic accompaniment, and can concentrate on the performance of the melody. Because it is possible, even beginners can easily enjoy the performance. Moreover, the automatic accompaniment performance is a one-track completion type in which the patterns such as fill-in and ending are automatically switched and the chord progression changes automatically, making the music interesting and rich in taste. You can enjoy. Further, the keynote can be arbitrarily selected by the performer. Therefore, even if it is an accompaniment of one song, it is possible to set a different key note in addition to the initially set key note, and one song can be played by various keys. is there.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a basic configuration of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of the electronic keyboard of the embodiment.

FIG. 3 is a front view showing a panel of the electronic keyboard of the embodiment.

FIG. 4 is an explanatory diagram showing a data structure of accompaniment pattern data according to the embodiment.

FIG. 5 is an explanatory diagram showing a data structure of basic pattern data according to the embodiment.

FIG. 6 is an explanatory diagram showing a data structure of automatic chord progression data according to the embodiment.

FIG. 7 is a flowchart showing a main routine of the embodiment.

FIG. 8 is a flowchart showing an interrupt process of the embodiment.

FIG. 9 is a flowchart showing an automatic chord progression data process of the embodiment.

FIG. 10 is a flowchart showing accompaniment pattern data processing according to the embodiment.

FIG. 11 is a time chart showing a performance example of an automatic accompaniment of one song completion format according to the embodiment.

[Explanation of symbols]

M1 ... Accompaniment pattern storage means, M2 ... Automatic chord progression data storage means, M3 ... Keynote selection means,
M4 ... Automatic accompaniment processing means, 1 ... Electronic keyboard,
3 ... keyboard, 7 ... accompaniment mode switch, 8 ... chord progression mode switch, 9 ... start switch, 10
… Keynote selection switch, 12… CPU, 13
... RAM, 15 ... accompaniment pattern data memory, 16 ... automatic chord progression data memory, 22 ... tone signal generation circuit,
30 ... Display unit, 30a ... First display area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Takano 200 Terashimacho, Hamamatsu City, Shizuoka Prefecture Kawai Musical Instrument Co., Ltd. (72) Inventor Satoshi Fujimoto 200, Terashima-cho, Hamamatsu-shi, Shizuoka Kawai Musical Instrument Mfg. Co., Ltd.

Claims (1)

[Claims] 1. An automatic accompaniment for an electronic musical instrument, which performs automatic accompaniment with a predetermined chord, based on accompaniment patterns such as fill-in patterns and ending patterns stored in accompaniment pattern storage means and chord information indicating chord types. In the device, a chord progression data storage means for storing chord progression data of automatic accompaniment for each music piece, the plurality of chord information, chord change timing data, and pattern switching data for instructing switching of the accompaniment pattern. A keynote selecting means for arbitrarily selecting a keynote, and switching the accompaniment pattern based on the keynote selected by the keynote selecting means and the chord progression data read from the chord progression data storage means. , In the specified chord progression based on the selected keynote An automatic accompaniment device for an electronic musical instrument, comprising: an automatic accompaniment processing means for performing an automatic accompaniment of one song complete format.