JPH0854881A - Automatic accompaniment device of electronic musical instrument - Google Patents

Abstract

PURPOSE:To make it possible to express the delicate nuance of musical tones according to the rhythms selected by setting of panel switches and the compasses inputted from a keyboard by providing the device with first and second memory means, a reading control means and a musical tone generating means. CONSTITUTION:The data indicating a development system for correcting the playing data read out of an automatic playing data memory 17 according to the rhythms assigned by operating elements and the respective timbres of the rhythms set by operating elements is stored in the first memory means 19. Further, the second memory means 20 has a table for assigning the tones produced according to the respective timbres, the number of the tones produced, order of tone production, etc. The reading control means 28 reads the corresponding table from the means 19 and the means 20 and produces the tones based on such data at the time of automatic playing. As a result, the number of the tones to be produced, the sequence of the tone production, etc., are changed according to the rhythms, the timbres and the compasses and the chords approximate to the chords of the actual acoustic musical instrument are obtd.

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 for an electronic musical instrument, which can change the chord pattern of the automatic accompaniment according to each tone color of a designated rhythm.

[0002]

2. Description of the Related Art A conventional electronic musical instrument stores a plurality of automatic accompaniment patterns for each rhythm, and operates a switch for selecting one of these automatic accompaniment patterns in accordance with the progress of a piece of music so that the memory can be stored I was playing the automatic accompaniment pattern.

However, these automatic accompaniment patterns are set on the basis of the most frequently used musical instruments, and when the timbre is different, the waveform read out is simply changed according to the timbre. It was not able to fully express the characteristics of each musical instrument.

For example, in the case of expressing the chord shown in FIG. 6 (a) with a conventional electronic musical instrument, the same sound is merely expressed by changing it to a tone color of a piano, a guitar or the like, and the sound heard is a guitar. However, there was a problem that chords did not always sound like a guitar.

This is because in an acoustic musical instrument, the sound represented by the chord shown in FIG. 6 (a) in a piano also has 6 strings in the case of a guitar, so as shown in FIG. 6 (b), This is because the guitar-like sound is expressed by expressing the sound of the 6th string including the chord of a).

In order to save memory, the automatic accompaniment pattern data is set with a fixed key, for example, C as a reference, and when the tones pronounced D # and E # are different,
The chord is simply raised and played.

Therefore, even a sound that is properly expressed in C is
It is not uncommon to hear unnatural sound due to lack of sound when the range changes.

For example, in an acoustic musical instrument, when the rock is selected as the rhythm pattern, the bass of the chord is emphasized, and when the fusion is selected, the treble is emphasized. Furthermore, even with the same chord, the number of times the chord is pronounced and the order in which the chords are pronounced varies depending on the selected musical instrument (timbre).

However, since the conventional automatic accompaniment apparatus for electronic musical instruments only controls for each rhythm, when a mode of a certain chord is selected in performing the automatic accompaniment of chords, regardless of the tone color of the accompaniment and the rhythm genre. , Each chord was pronounced uniformly in the same number and order of pronunciation.

As described above, in the live performance, the accompaniment method differs depending on the type of musical instrument or the musical composition, but in the automatic accompaniment of the electronic musical instrument, the difference in tone color, that is, the characteristic of the musical instrument is not taken into consideration, and the same chord Differences due to different tones are not taken into consideration.

Therefore, the conventional automatic accompaniment device for an electronic musical instrument has a problem in that it is not possible to give expressive power to an accompaniment according to a rendition style. There is a demand for an automatic accompaniment device capable of playing.

[0012]

As described above, in the acoustic musical instrument, even if the same chord is used, the number and development of the constituent tones of the chord cannot be different depending on the musical instrument, and the acoustic musical instrument is an acoustic musical instrument when played by an electronic musical instrument. There were times when the development of chords was different from playing in.

The present invention has been made in view of the above circumstances, and provides an automatic accompaniment apparatus for an electronic musical instrument capable of expressing subtle nuances of a musical sound in accordance with a rhythm selected by setting a panel switch or a range input from a keyboard. The purpose is to provide.

[0014]

According to a first aspect of the present invention, an automatic accompaniment apparatus for an electronic musical instrument, which sequentially reads stored musical tone information and performs automatic accompaniment, is an input for inputting information from the outside such as a keyboard or an operation panel. Means 10 and 12 and a development system for correcting the automatic performance pattern data according to the rhythm genre and the timbre used in those rhythms among the information input by the input means 10 and 12 are stored. A first storage means 19; a second storage means 20 for storing a chord pattern for determining a chord to be produced based on a development system for each tone color read from the first storage means 19; Based on the rhythm genre input from the input means 12, a development system is read from the first storage means 19, and based on the read development system, from the second storage means 20. And reading control means 28 reads a code pattern to be sound, and a musical tone generator 22 for generating a musical tone based on the code pattern of the automatic accompaniment read by the reading control means 28.

A second invention is the same as the first invention,
In addition to the first storage means 19 and the second storage means 20, a third storage for storing data for correcting the code pattern data read by the reading control means 28 in accordance with the sound range to be sounded. And a range control unit 29 for reading the chord pattern data for correcting the automatic accompaniment data from the third storage unit 21.

A third aspect of the present invention is the same as the first and second aspects, wherein the first storage means 19 and the second storage means 2 are provided.
The data stored as 0 is provided for each code data of intro, normal, fill-in, and ending, and the code pattern is modified based on these data.

A fourth aspect of the present invention is the same as the first to third aspects, wherein the first storage means 19 and the second storage means 2 are provided.
The correction data stored as 0 is configured to be stored for each tone color block division.

[0018]

The automatic accompaniment of the conventional electronic musical instrument cannot be changed for each timbre, although it can be changed for each rhythm. For example, even in the case of sounding a stringed instrument (six-string guitar) with a single keyboard (SK four-tone poly, etc.), the number of pronunciations is limited to four voicings due to the system configuration.

The present invention solves these problems, for example, in the case of a guitar, at least 6 voicings are secured to ensure the simulation of a guitar system, and the effect is closer to a live performance in terms of music. Is what you get.

Therefore, the first storage means 19 stores the performance data read from the automatic performance data memory in the rhythm (for example, country, pops, etc.) designated by the operator.
Also, data indicating a development system for making corrections according to each tone color of the rhythm set by the operator is stored.

Further, in the second storage means 20, the first
On the basis of the expansion system read from the storage means 19 of the above, there is a table for designating sounds to be sounded according to each tone color, the number of sounds to be sounded, sounding order, etc. The reading control means 28 reads the corresponding table from the first storage means 19 and the second storage means 20 in accordance with the code part, and sounds based on the data.

Since the automatic musical performance data of the electronic musical instrument is most often used, for example, the piano is used as a reference, the musical instrument having a polyphonic number different from that of the piano, such as a guitar, is Based on the data in the first storage means 19, a development system serving as a reference for sounding is determined, and based on the development system, the data in the second storage means 20 is read out to determine the sounds to be sounded, the number of sounds to be sounded, the sounding order, and the like. It is a thing.

Further, the automatic performance data of the electronic musical instrument is set based on a certain key (for example, C), and the chords are raised and lowered when different tone ranges are produced. May become.

The second invention is made to solve these problems, and the sound determined in the first invention can be changed according to the range to be sounded, It adds the necessary sounds.

Therefore, the third storage means 21 stores data for adding or changing the sound determined by the reading control means 28 in accordance with the sound range. 29 reads and corrects these data.

As a result, a performance closer to that of an acoustic instrument can be achieved.

A third invention is to apply the first and second inventions to the chord data of intro, normal, fill-in and ending of the automatic performance pattern data. This allows more delicate expressions.

According to a fourth aspect of the present invention, the data for each tone color in the first to third aspects is provided for each tone color block section. This makes it possible to significantly reduce the memory.

As described above, according to the present invention, for example, in the case of a guitar, an automatic accompaniment is performed with various playing methods of various musical instruments, such as playing different from a piano chord like a guitar. Therefore, it is possible to perform a natural performance close to that of an acoustic instrument.

The effect of the present invention is not limited to the above example,
Since it can also be applied to various other elements in a composite manner, it is possible to provide an automatic accompaniment device for an electronic musical instrument with significantly improved musicality.

[0031]

Embodiments of the automatic accompaniment apparatus for an electronic musical instrument of the present invention will be described below with reference to the drawings. FIG. 1
FIG. 1 is a block diagram schematically showing an overall configuration of an electronic musical instrument according to the present invention.

In the following description, the same parts are designated by the same reference numerals, and an automatic accompaniment device for an electronic musical instrument, which is a combination of the first and second inventions, will be described as an example.

In the figure, reference numeral 10 designates a keyboard, a plurality of keys, a key switch which opens / closes in association with key pressing / release operations of these keys, a key scanning circuit for detecting the open / closed state of these key switches, etc. Is included. This keyboard 10
The signal indicating the key-depression / key-release state detected by the key scan circuit of is sent to the keyboard interface 11.

The keyboard interface 11 mediates transmission and reception of signals between the keyboard 10 and the system bus 30. Signals sent from the keyboard 10 indicating the key-depression / key-release status are transmitted from the keyboard interface 11 and the system bus 3.
It is adapted to be sent to the CPU 14 via 0.

An operation panel 12 is provided with various switches, a display and the like for controlling the automatic accompaniment apparatus.
Further, the operation panel 12 includes a panel scan circuit for detecting ON / OFF of various switches.

A panel scan signal (not shown) is supplied from the CPU 14 to the operation panel 12, and the operation panel 12 outputs panel scan data indicating the setting state of the switch in response to the panel scan signal. To do. This panel scan data is stored in the CPU 14
Is stored in a predetermined area of the RAM 15.

The above-mentioned various switches include, in addition to switches such as a tone color selection switch, a rhythm selection switch, and a volume control switch, which are generally provided in electronic musical instruments.
A rhythm switch for starting a rhythm performance, a fill-in switch for inserting a fill-in, an intro switch for automatically playing an intro pattern, an ending switch for automatically playing an ending pattern (all not shown), and the like are provided.

The panel interface 13 mediates transmission and reception of signals between the operation panel 12 and the system bus 30. A signal indicating the on / off state of the switch, which is sent from the operation panel 12, is sent to the CPU 14 via the panel interface 13 and the system bus 30.

A central processing unit (CPU) 14 controls each part of the electronic musical instrument in accordance with a control program stored in a program memory 16. The CPU 14 has a RAM 15, a program memory 16,
Music waveform memory 18, automatic performance pattern data memory 1
7 and the tone generation circuit 22 are connected via a system bus 30.

A development system determination map 19 for storing a development system of sounds corresponding to the genre of rhythm directly related to the present invention, and a sound generation based on the development system of the sounds read from the development system determination map 19 The correction map 20 based on the tone color that stores the data that specifies the sounds to be played, the number of pronunciations, the pronunciation order, and the correction map 21 based on the tone range that stores the data to select the sounds to be produced according to the tone range Connected to the CPU 14 via the bus 30,

The reading control section 28 and the range control section 29 provided in the CPU 14 are realized by the software of the CPU 14.

The reading control section 28 reads out correction data from the expansion system determination map 19 and the tone color correction map 20 based on a flag corresponding to a rhythm setting state by a switch or the like on the operation panel 12, and an automatic performance pattern. The data read from the data memory 17 is corrected.

The tone range control unit 29 reads the tone range correction map 21 in accordance with the tone range of the depressed keyboard 10, changes the tone range based on the data, and adds necessary sounds.

15 is a random access memory (RAM)
The performance data, the device status information, the work area of the CPU 14,
Various registers and flags for controlling the electronic musical instrument are defined.

Reference numeral 16 is a program memory, for example, R
It is composed of OM and stores a control program for controlling an electronic musical instrument. In addition to the control program, various fixed data used by the CPU 14 are stored in this ROM. This program memory 16 is CP
It is accessed by the U14 via the system bus 30.

An automatic performance pattern data memory 17 stores pattern data used for automatic performance. The format of the data stored in the automatic performance pattern data memory 17 will be described in detail in the description of FIG.

A musical tone waveform memory 18 stores musical tone waveform data and envelope data corresponding to various tone colors and tone ranges. The tone waveform memory 18 is accessed by the tone generating circuit 22 via the system bus 30.

Reference numeral 19 denotes a development system determination map, which stores the development system of the chord pattern selected according to the rhythm genre and tone color. The development system of the chord pattern selected according to the genre of the rhythm is set by the player operating the operators on the operation panel 12 before the performance starts.

Reference numeral 20 is a timbre-corrected map, and determines the sounds to be sounded, the number of sounds to be sounded, the order of sounding, etc., based on the expansion system data and timbre read by the reading control unit 28 from the expansion system determination map 19. For storing the data. The data of the timbre-corrected map 20 is read by the read control unit 28.

Reference numeral 21 is a correction map according to the tone range, and data for adding or changing the data read from the correction map 20 according to the tone color by the reading control unit 28 in accordance with the tone range to be generated is addressed or waveform. It is stored as a number or the like. The data of the tone range map is read by the tone range control unit 29 and sent to the tone generation circuit 22.

Reference numeral 22 is a tone generation circuit, which reads tone waveform data and envelope data corresponding to the tone color designated by the control data output from the keyboard 10 or the CPU 14 from the tone waveform memory 18, and envelopes the read tone waveform data. Is added and output as a musical tone signal. The tone signal output by the tone generating circuit 22 is supplied to the D / A converter 23.

Reference numeral 23 denotes a D / A converter, which converts the input digital musical tone signal into an analog musical tone signal. The analog tone signal converted by the D / A converter 23 is supplied to the amplifier 24.

The amplifier 24 amplifies the musical tone signal supplied from the musical tone generating circuit 22 with a predetermined gain and supplies it to the speaker 25.

The speaker 25 converts the inputted analog musical tone signal as an electric signal into an acoustic signal. That is, the musical tone is emitted according to the generated musical tone signal. The speaker 25 emits a musical sound corresponding to the pressing of a key on the keyboard 10, and also emits an accompaniment in a designated manner.

Since a stereo sound source is used in this embodiment, a plurality of amplifiers 24 and speakers 25 are provided.

Next, the structure and function of the memory used in this embodiment will be described with reference to the drawings. FIG. 2 shows an example of the configuration of the ROM used in this embodiment.

In FIG. 2, reference numeral 16 denotes a program area in which a program for controlling all electronic musical instruments of the present invention is stored.

Reference numeral 19 denotes a development system determination map, which stores development data read according to the rhythm genre set by the performer before the performance starts. That is, in this memory, for example, according to each rhythm genre such as country, pop, and soul, and each tone color such as guitar and piano,
I remember what kind of chord expansion system to use.

As shown in an example of the tone color development system of FIG.
For example, the chords of Domisodo (expansion 1) and the chords of Dosodomi (expansion 2) and Dosomid (expansion 3) have the same configuration.

However, even in the case of the same chord, domi-sodo (expansion 1) in which the sound gradually rises and dosodomi (expansion 2) in which the sound greatly fluctuates have different sensations of sound such as softness and developability.

Therefore, such various pronunciations are named, for example, Domisodo is expansion 1 and Dosodomi is expansion 2, and the expansion map 19 shows which expansion system is selected for each chord according to the genre and tone color. Is stored.

Reference numeral 20 is a timbre-corrected map, which stores the data actually sounded in accordance with the expansion system designated by the expansion system determination map 19. That is, the development map of all chords for each tone color is stored in the tone color correction map 20, and the reading control unit 28 uses the tone colors and the development system names read from the development system determination map 19 as keys. Read by.

Reference numeral 17 is an automatic performance pattern data memory in which pattern data used for automatic performance is stored. Regarding the structure of the automatic performance pattern data,
This will be described in detail with reference to FIG.

Reference numeral 21 is a correction map according to the tone range, which stores data relating to the tone to be added or changed in accordance with the tone range of each tone. The data of the map 21 is read by the tone range control unit 29, the CPU 14 selects a sound signal of a sound to be generated based on the data, and sends it to the tone generation circuit 22.

The demo area in FIG. 2 is a known area in which demonstration songs for demonstrating the performance of the musical instrument are stored.

Next, the structure of the automatic performance pattern data will be described with reference to FIG.

As shown in FIG. 3, the automatic performance pattern data memory 17 has intro, normal, fill-in, and ending pattern data for each rhythm, and each of the intro, normal, fill-in, and ending patterns. The pattern data has a three-track structure consisting of chord, bass, and drum data.

The chord, bass, and drum data are composed of a plurality of performance data for generating musical tones of one to several measures. Each performance data is key number KE
Y or bar END or pattern END (in the figure, "KE
"Y" is representatively shown), step time STE
P, gate time GATE and velocity VELO.

Here, the key number KEY designates a pitch and is a number assigned to each key of the keyboard 10. The bar END is information indicating the end of the bar.
The pattern END is information indicating the end of the pattern data.

The step time STEP is information for designating a sounding time within a bar. The gate time GATE is information that specifies the time at which the sound should be generated. Velocity VELO is information that specifies the strength of the sound to be produced.

This automatic performance pattern data memory 17
Are accessed by the CPU 14 via the system bus 30.

The reading control unit 2 directly related to the present invention
The tone color information, which is a key when 8 reads the expansion system determination map 19, is stored in each code data of intro, normal, fill-in, and ending.

Next, the operation of the embodiment of the present invention having the above configuration will be described with reference to the flow chart.

FIG. 4 is a main flow chart for explaining the overall operation of this embodiment.

When the power is turned on, as shown in FIG. 4, first, initialization processing is performed (step S10). This initialization processing sets the internal state of the tone generation circuit 22 to the initial state to prevent unnecessary sounds from being generated when the power is turned on, clears a predetermined area of the RAM 15, registers, flags, and volume. , A process of setting data such as tone color to an initial state.

As a result, when the keyboard 10 is operated, a predetermined tone color is emitted at a predetermined volume.

Next, keyboard event processing is performed (step S11). The keyboard event process is a process for detecting a chord in response to a key press / release of a key on the keyboard 10.

That is, when the automatic performance mode is not set, the data concerning the key depression / key release of the keys of the keyboard 10 is fetched, the fetched data is searched to check the presence of an event, and it is judged that the event is an on event. , Is read into the CPU 14 via the keyboard interface 11 and stored in the RAM 15 to set a musical tone sequence. This data is used for the rhythm performance processing which will be performed later.

In the correction of the sound data according to the range of the present invention, the range control unit 29 reads the key data fetched by the keyboard event processing and stored in the RAM 15, and the correction map by the range is based on this range. This is done by reading the correction data from 21.

Next, panel processing is performed (step S12). That is, the on / off state of each switch detected by the panel scan circuit of the operation panel 12 is determined by the CPU 14
And is stored in a predetermined area of the RAM 15.

Then, it is checked whether or not there is an on event in the switch of the operation panel 12. This compares the on / off state of each switch (stored in RAM) that was loaded from the operation panel 12 last time with the on / off state of each switch that was loaded from the operation panel 12 this time,
This is done by checking if there is a newly turned on switch.

The data from the operation panel 12 is used for expansion system determination processing and tone color correction processing, which is performed later, that is, for selective correction of sounds according to each rhythm and tone color set by the operator.

Then, it is checked whether or not the rhythm switch is turned on (step S13). This is done by checking the flag of the event map created by the panel scan processing in step S12.

When it is determined that the rhythm switch is not on, the process returns to the keyboard event process of step S11, and the above routine is repeated.

On the other hand, if it is determined that the rhythm switch is on, rhythm performance processing is performed (step S1).
4) When the rhythm performance process ends, the process returns to the keyboard event process of step S11, and the above routine is repeated. The rhythm performance processing will be described in detail in the following description of the rhythm performance processing.

Next, the operation of the rhythm performance process performed in step S14 will be described with reference to the flow chart of the rhythm performance process of FIG.

In this rhythm performance processing, first, it is checked whether or not it is the performance data read timing (step S40). This is a process of determining whether or not it is time to read the performance data from the automatic performance pattern data memory 17 by checking the read timing clock output from the timing clock generator (not shown).

When it is determined that it is not the read timing, the following rhythm performance processing is not performed and the process returns to the main routine.

On the other hand, when it is determined that it is the read timing, the automatic performance pattern data is read (step S41).

Then, it is checked whether or not the step time STEP (see FIG. 3) included in the read performance data is equal to the content of the rhythm counter COUNT (step S42). , Return from this rhythm performance processing routine.

On the other hand, if the step time STEP is equal to the content of the rhythm counter COUNT, it is checked whether or not the previously read performance data is information indicating the pattern END (step S43). This is done by examining a predetermined bit included in the first byte of the performance data. The following measures END (step S45)
The judgment in is similar.

When it is determined that the information is pattern END information, it is determined that the rhythm performance process of a predetermined measure is completed, and the rhythm start process is performed again (step S44). This enables continuous rhythm performance.

On the other hand, if it is determined in step S43 that the pattern is not the pattern END information, the expansion system determination process is first performed (step S45). This is a process of reading out the development system of a chord from the expansion system determination map according to the rhythm genre set by the performer by operating the operator before starting the performance.

In the expansion system determination processing, the reading control unit 28 of the CPU 14 checks the rhythm genre set in the panel event map created and stored in the panel processing of step S12 of the main routine, and then illustrated in FIG. Read the tone color from the chord data of the automatic performance pattern data.

Next, the expansion system of the corresponding code is read from the expansion system determination map 19 using the read rhythm genre and tone color as keys.

Subsequently, a tone color correction process is performed (step S46). This is to change the reverberation and effect of the sound by changing the development of the sound according to the timbre as shown in the timbre development example of FIG.

In the timbre correction processing, the reading control unit 28 of the CPU 14 uses the timbre read in step S45 and the development system as keys to generate the number of tones and pronunciation order of the chords produced in the measure from the timbre correction map 20. To read. As a result, the number of simultaneous pronunciations of chords, the order of pronunciation, etc. are determined.

The data read from the tone color correction map 20 is sent to the CPU 14, and the CPU 14 corrects the performance data read from the automatic performance pattern data.

Next, a correction process according to the musical range is performed (step S47). The correction process based on the range is a process of changing the range according to the range to be sounded and adding a necessary sound.

In the correction processing based on the tone range, the tone range control unit 29 takes in the keyboard event process in step S11 of FIG. 4 and checks the tone range of the sound produced from the key event map stored in the predetermined area on the RAM 15.

Then, using the read tone range as a key, the tone map data on the ROM is used to read the data of the tones to be selected according to the tone range of the chord to be generated, send the data to the CPU 14, and the CPU 14 Controls the sound produced.

Next, a tone generation process is performed based on the performance data corrected by the expansion system determination process, the tone color correction process, and the tone range correction process (step S4).
8).

Next, the next performance data in the automatic performance pattern data is read (step S49), and the STEP information in the data is set in a predetermined buffer (step S50). Then, the process returns to step S42 and the same processing as described above is performed.

When the processing for all performance data having the same step time is completed in this way, the process returns from this rhythm performance processing routine.

Thus, the genre of each rhythm, tone color,
A chord pattern is played according to the range.

A third aspect of the invention is to make the intro, normal, fill-in, and ending chord data of the automatic accompaniment pattern data hold tone color information so that the intro, normal, and
The chord pattern is controlled according to the tone color for each of fill-in and ending.

As a result, more delicate control of the sound becomes possible, and a performance closer to that of an acoustic instrument becomes possible.

In a fourth aspect of the present invention, in the first to third aspects of the present invention, the data contained in the expansion system determination map 19 and the tone color correction map 20 is held for each tone color block, thereby saving memory. It is intended.

For this reason, the tone color blocks are classified and classified according to the characteristics of the musical instrument, such as a string instrument, a wind instrument, and a keyboard instrument, and the expansion system and chord pattern data are stored according to the classification classification. It enables the performance of an acoustic musical instrument with a small memory.

In the present embodiment, the rhythm genre,
Although the expansion system is automatically determined according to the timbre used in those rhythms, the expansion system may be directly set by operating the player operator.

It goes without saying that the present invention can be modified based on various factors without departing from the scope of the present invention.

[0112]

As described above, according to the present invention, the number of pronunciations, the order of pronunciations, etc. can be changed according to the rhythm, tone color, and range, and it is possible to obtain a chord expansion close to that of an actual acoustic instrument. An automatic accompaniment device for an electronic musical instrument can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing the overall configuration of an embodiment of an automatic accompaniment apparatus of the present invention.

FIG. 2 is a diagram for explaining the configuration and function of a ROM of the automatic musical instrument of the present invention.

FIG. 3 is a diagram showing an example of a data storage format of an automatic performance pattern data memory.

FIG. 4 is a flowchart (main flowchart) for explaining the operation of the embodiment of the present invention.

FIG. 5 is a flowchart for explaining the rhythm performance process in FIG.

FIG. 6 is a diagram for explaining an example of a chord according to a timbre.

[Explanation of symbols]

 10 keyboard (input means) 11 keyboard interface 12 operation panel (input means) 13 panel interface 14 CPU 15 RAM. 16 program memory 17 automatic performance pattern data memory 18 tone waveform memory 19 rhythm expansion map (first storage means) 20 tone color correction map (second storage means) 21 range correction map (third storage) 22) Musical sound generation circuit (musical sound generation means) 23 D / A converter 24 Amplifier 25 Speaker 28 Reading control section (reading control means) 29 Sound range control section (sound range control means)

Claims (4)

[Claims] 1. An automatic accompaniment device for an electronic musical instrument, which sequentially reads stored musical tone information and performs automatic accompaniment, wherein input means for inputting information from the outside, and rhythm of the information inputted by the input means First storage means for storing a development system for correcting automatic performance pattern data according to genres and timbres used in those rhythms; and for each timbre read from the first storage means Second storage means for storing chord pattern data for determining a chord pattern to be generated based on the expansion system, and the expansion system from the first storage means based on the rhythm genre input by the input means. Read control means for reading a code pattern generated from the second storage means based on the read-out development system, and the read control means. Automatic accompaniment apparatus for an electronic musical instrument characterized by comprising a tone generating means for generating a music based on the code pattern of the saw taken automatic accompaniment. 2. In addition to the first storage means and the second storage means, a third storage means for storing a table for correcting the code pattern data read by the reading control means in accordance with a sound range to be sounded. 2. The automatic accompaniment apparatus for an electronic musical instrument according to claim 1, further comprising: a storage means for storing the musical composition, and a range control means for reading chord pattern data for correcting the automatic performance data from the third storing means. 3. The correction data stored in the first storage means and the second storage means are provided for each code data of intro, normal, fill-in, and ending. 2. An automatic accompaniment device for an electronic musical instrument according to 2. 4. The electronic musical instrument according to claim 1, wherein the correction data stored in the first storage means and the second storage means are stored for each tone color block division. Automatic accompaniment device.