JPH06324680A - Accompaniment pattern changing device - Google Patents

Abstract

PURPOSE:To perform switching from a normal pattern to many kinds of accompaniment patterns such as a fill-in pattern, a break pattern, and an ending pattern by an automatic accompaniment device through easy operation. CONSTITUTION:When it is decided in S703 that the same chord are successively specified in a key area of a lower keyboard, the kind of the finally pressed key is decided in S704 and the touch level at the time of the keying is decided in S705, S708, and S711. According to their decision results, one of flags F1, F2, B1, B2, E1, and E2 for indicating changes from the normal pattern to other accompaniment patterns is selectively set in a pattern register PAT in S706, S707, S709, S710, S712, and S713. An automatic accompaniment pattern for an automatic accompaniment performance is determined on the basis of the contents of the pattern register PAT.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic accompaniment apparatus having an automatic accompaniment function, and more particularly to a technique for switching an accompaniment pattern from a normal pattern to a fill-in pattern, a break pattern, an ending pattern or the like.

[0002]

2. Description of the Related Art In an automatic accompaniment device for an electronic musical instrument, for example, a keyboard range is usually divided into a lower range and an upper range, and a user plays a melody in the upper range. However, a chord can be designated by performing a key depression operation with one to three fingers in the lower keyboard range, and an automatic accompaniment having the designated chord is performed with a pre-designated accompaniment pattern. Be seen.

In such an automatic accompaniment apparatus, a fill-in pattern, a break pattern, and
Alternatively, some have a function of inserting a special accompaniment pattern such as an ending pattern. With such a function, various changes can be added to the accompaniment pattern.

In order to switch a normal pattern to a fill-in pattern, a break pattern, or an ending pattern in the middle of automatic accompaniment, conventionally, a user has
Switching is performed by pressing the operation switch corresponding to each pattern on the operation panel of the electronic musical instrument.

The fill-in pattern or break pattern continues for a period of about one to several measures, and then automatically returns to the normal pattern at the breaks of measures. Further, the ending pattern also continues for a period of about 1 to several measures, and then the automatic accompaniment stops.

[0006]

However, during automatic performance, as described above, the user must specify a chord in the lower keyboard range and play a melody in the upper keyboard range. Therefore, when the user gives an instruction to change the accompaniment pattern while operating the operation panel together with these operations, the user's performance operation is complicated.
It has a problem that it is not possible to achieve the desired automatic accompaniment.

When there are many types of accompaniment patterns such as fill-in patterns, break patterns, and ending patterns, operation switches corresponding to each pattern are required on the operation panel, which makes the operation panel complicated and increases the cost of the electronic musical instrument. It has a problem of being invited.

An object of the present invention is to make it possible to change many types of accompaniment patterns with a simple operation.

[0009]

The present invention firstly has a code designating means for sequentially designating a code, for example, according to the operating states of a plurality of operators (keys on a keyboard, etc.).

Next, an accompaniment pattern generating means for generating an accompaniment pattern is provided. This means includes, for example, an accompaniment pattern memory that stores a fill-in pattern, a break pattern, an ending pattern, etc., in addition to the normal pattern, a memory reading circuit, and a timing according to the accompaniment pattern read from the accompaniment pattern memory. To generate accompaniment pronunciation control data corresponding to the chord designated by the chord designating means,
And a control circuit for outputting the tone generation control data as control data for tone generation.

Further, there is a changing means for changing the accompaniment pattern generated by the accompaniment pattern generating means when the same code is continuously specified by the chord specifying means. The changing unit may, for example, according to the type of the operated operator (for example, type of root sound, third sound, fifth sound, etc.)
Or, depending on the touch of the operator, or depending on both the type and touch of the operator, the accompaniment pattern, for example from the normal pattern to fill-in pattern, break pattern, or another accompaniment pattern such as ending pattern. To change.

[0012]

The user can specify an arbitrary chord for automatic accompaniment by depressing, for example, three fingers in the chord designating means such as a predetermined keyboard range of the lower keyboard.

At this time, the user designates one chord, for example, as a key-depressing operation of three fingers, and then, while maintaining the key-depressing state, the root sound, the third sound, or the fifth sound of the three fingers. By selectively and continuously pressing any one of the keys, for example, a normal pattern, which is an accompaniment pattern currently being automatically accompaniment, can be played as a fill-in pattern, a break pattern, or an ending pattern. Can be changed to a pattern.

Further, the type of accompaniment pattern can be changed by performing the above-mentioned key depression again with either a strong touch or a weak touch. As described above, according to the present invention, the accompaniment pattern can be specified simultaneously with the chord specification during the automatic accompaniment.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. <Structure of Embodiment of the Present Invention> FIG. 1 is an overall structure diagram of an embodiment of the present invention.

The microcomputer 103 operates by using the RAM 109 incorporated therein as a work memory based on a control program stored in the ROM 108 incorporated therein, and scans the function key portion 101 and the keyboard portion 102. While accommodating each function key and the operation state of the key, accompaniment pattern data for automatic accompaniment is read from the automatic accompaniment memory 104, and a musical tone generating operation and an automatic accompaniment operation are performed.

The musical tone waveform data generated in each sampling period is stored in the RAM 109 based on the latch signal COM.
After being latched by the first latch 110 from the accumulation register R in the above, it is latched by the second latch 111 based on the interrupt signal INT which is accurately synchronized with the sampling period, and the D / A converter incorporated in the microcomputer 103. It is output to 112.

The musical tone waveform data described above is obtained by the D / A converter 1.
At 12, the signal is converted into an analog tone waveform signal, the signal is shaped by a low-pass filter (LPF) 105, amplified by an amplifier 106, and emitted from a speaker 107.

FIG. 2 is a diagram showing a register group stored in the RAM 109 in the microcomputer 103.
The chord register CODE stores chords for the automatic accompaniment currently selected based on the user's key depression operation in the lower keyboard range.

In the pattern register PAT, fill-in patterns # 1 and # 2 for automatic accompaniment, which are also currently selected based on the user's key depression operation in the lower keyboard range,
Break pattern # 1, # 2, or ending pattern #
A flag indicating either accompaniment pattern of 1 or # 2 is stored. The pattern register PAT indicates that the normal pattern is selected when none of the above flags is set therein.

The touch register TOUCH stores touch data indicating a touch speed (velocity) at the time of a key pressing operation by the user. FIG. 3 is a diagram showing a data structure in the automatic accompaniment memory of FIG.

A normal pattern, a fill-in pattern # 1, a fill-in pattern # 2, a break pattern # 1, a break pattern # 2, an ending pattern # 1 and an ending pattern # 2 are set for each music type of automatic accompaniment such as rock and waltz. Seven types of accompaniment patterns are stored. <Principle of Operation of the Embodiment of the Present Invention> In the embodiment of the present invention having the above-described configuration, the user performs a key depression operation of, for example, three fingers in a predetermined keyboard range of the lower keyboard on the keyboard unit 102 of FIG. As a result, an arbitrary chord for automatic accompaniment can be designated. When this designation is made, subsequent automatic accompaniment is performed with the designated chord.

Further, as a feature particularly related to the present invention,
The user designates one chord, for example, as a key pressing operation with three fingers, and then selects any one of the root sound, the third sound, and the fifth sound of the three fingers while maintaining the key pressing state. By pressing the key once again, it is possible to change the normal pattern, which is the accompaniment pattern currently being automatically accompanied, to any accompaniment pattern of the fill-in pattern, the break pattern, or the ending pattern.

Further, by performing the above-mentioned re-key depression with either a strong touch or a weak touch, the fill-in pattern of # 1 or # 2 (when the root sound is depressed again), # 1 or # 2.
Of the break pattern (when the third key is pressed again) or the ending pattern of # 1 or # 2 (when the fifth key is pressed again).

In this way, among the accompaniment patterns changed from the normal pattern, the fill-in pattern or the break pattern continues for a period of about 1 to several measures, and then automatically returns to the normal pattern at the break of measures. . Further, the ending pattern also continues for a period of about 1 to several measures, and then the automatic accompaniment stops.

As described above, in the embodiment of the present invention,
During the automatic accompaniment, the accompaniment pattern can be changed from the normal pattern to the fill-in pattern, the break pattern, or the ending pattern without operating the keys of the function key unit 101. <Specific Operation of Embodiment of the Present Invention> A specific operation of the present embodiment based on the above-described operation principle will be described in detail below.

FIG. 4 is a main operation flow chart showing the overall operation of the control operation executed in the microcomputer 103. This flow is realized as an operation in which the microcomputer 103 executes the control program stored in the ROM 108.

First, when the power of the apparatus is turned on, the contents of the RAM 109, the contents of the first latch 110 and the second latch 111 in the microcomputer 103 are initialized in step S401.

After that, each processing of steps S402 to S406 is repeatedly executed. In the function key acquisition processing of step S402, in addition to the accompaniment designation key for selecting the music type of the automatic accompaniment pattern (not shown) in the function key unit 101, the function key portion 101 includes function keys such as a tone color setting key, effector setting key, and modulation key The setting state is scanned, and the setting state is taken into the RAM 109 or the like.

In the function key process of step S403, a process corresponding to the setting of each function key of the function key unit 101, for example, a process of changing the tone color of the generated musical tone waveform data is executed.

In the keyboard loading process of step S404,
The key pressing state of the keyboard unit 102 is scanned, and the key pressing state is taken into the RAM 109 or the like. Step S405
In the keyboard processing of, the RAM 1 corresponds to the above-mentioned key depression state.
The necessary tone generation control data is set in the tone generation control data area provided in No. 09, and RA corresponding to the performance instruction data read by the function key processing of step S403.
Necessary sound production control data is set in the sound production control data area provided in M109. Further, as processing particularly related to the present invention, an operation of deciding a chord and an accompaniment pattern designated by the user in response to a user's key depression operation in the lower keyboard range, and a chord and an accompaniment pattern decided. Then, the operation of reading the accompaniment pattern data from the automatic accompaniment memory 106 and setting the necessary sounding control data in the sounding control data area provided in the RAM 109 is executed.

In various other processes in step S406,
For example, a process of changing the pitch of the musical sound being generated based on the pitch envelope is executed. FIG. 5 is an operation flowchart of a timer interrupt routine for generating musical tone waveform data. This routine is executed by interrupting the routine of the main operation flowchart of FIG. 4 every time the time corresponding to the sampling period elapses in the hardware timer (not shown) in the microcomputer 103.

In step S501, musical tone waveform data for four sound generation channels is generated. This step S501
The details of the above are shown as an operation flowchart of FIG. In FIG. 6, in step S601, the contents of the accumulation register R in the RAM 109 are cleared.

In step S602, based on the tone generation control data of the first channel set in the tone generation control data area in the RAM 109 in step S405 of the main operation flowchart of FIG. 4 based on the user's keyboard performance or automatic accompaniment action, The process of generating the tone waveform data of the sounding channel of the first channel is executed. Here, a musical tone is generated by, for example, a modulation method for generating musical tone waveform data by modulating a predetermined function waveform or a waveform reading method for generating musical tone waveform data by reading waveform data stored in a waveform memory (not shown). Waveform data is generated. The musical tone waveform data obtained here is accumulated in the accumulation register R.

In step S603, based on the sound control data of the second channel set in the sound control data area in the RAM 109 in step S405 of the main operation flowchart of FIG. 4 based on the keyboard performance or the automatic accompaniment operation by the user, The process of generating the tone waveform data of the sounding channel of the second channel is executed by the same method as that of the first channel, and the tone waveform data obtained as a result is
It is accumulated in the accumulation register R in which the musical tone waveform data of the first channel is stored.

In steps S604 and S605, the third and fourth channels set in the sounding control data area in the RAM 109 in step S405 of the main operation flowchart of FIG. 4 are respectively based on the keyboard performance or the automatic accompaniment operation by the user. Based on each sound generation control data of the eye, processing for generating musical tone waveform data of each sound generation channel of the third channel and fourth channel is executed by the same method as that of the first channel, etc., and each musical sound obtained as a result. The waveform data is sequentially accumulated in the accumulation register R.

As the above processing, step S501 in FIG.
Sound source processing is executed. In step S502, the latch signal COM is output, so that the accumulated values of the musical tone waveform data of the first to fourth channels obtained in the accumulation register R in the RAM 109 are stored in the microcomputer 10.
It is latched in the first latch 110 (FIG. 1) in the circuit 3.

Here, since the timing at which the data is latched in the first latch 110 varies within the sampling period depending on the conditions of the sound source processing, the accumulated value of the musical tone waveform data latched in the first latch 110 is further The D / A converter 11 is latched by the second latch 111 based on the interrupt signal INT which is accurately synchronized with the sampling cycle.
2 is output.

Subsequently, the control operation of the automatic accompaniment particularly related to the present invention will be sequentially described. FIG. 7 shows a part of the keyboard processing of step S405 of the main operation flowchart of FIG. 4, which is particularly relevant to the present invention, specifically, FIG.
5 is an operational flowchart showing a process for determining an accompaniment pattern read from the automatic accompaniment memory 104 of FIG.

First, in step S701, it is determined in the keyboard section 102 of FIG. 1 whether or not a key-on has occurred in the keyboard range of the lower keyboard for accompaniment chord designation. If the determination in step S701 is NO, it is not necessary to change the accompaniment pattern and accompaniment chord, so the processing of the operation flowchart of FIG. 7 is not executed, and other particularly control operations for advancing automatic accompaniment not shown. Is executed.

If the determination in step S701 is YES, in step S702, the ROM 1 of FIG. 1 is based on, for example, three types of key-on information detected in the keyboard range of the lower keyboard.
By referring to a code table (not shown) in 08, it is determined whether or not a predetermined code is established based on the above-mentioned, for example, three types of key-on information.

If the determination in step S702 is no,
The accompaniment pattern and the accompaniment code are not changed, and the processing of the operation flowchart of FIG. 7 is ended, and other control operations for advancing other particularly unillustrated automatic accompaniment are executed.

If the determination in step S702 is YES, the above code established based on the key pressing operation by the user in step S703 is set in the code register CODE (FIG. 2) in the RAM 109 in FIG. It is determined whether or not In the code register CODE,
The code selected so far is stored (see step S714 described later).

If the above code established based on the key pressing operation by the user does not match the code set in the code register CODE and the determination in step S703 is NO, a new code is designated by the user. Therefore, in step S714, the established code is newly set in the code register CODE. After this process, the process of the operation flow chart of FIG. 7 is terminated, and another control operation for advancing another not-shown automatic accompaniment is executed. Specifically, the automatic accompaniment memory 1
The accompaniment pronunciation control data corresponding to the chord specified in the chord register CODE is generated at a timing in accordance with the accompaniment pattern read out from the RAM 109.
It is set in the sound generation control data area provided in the.

If the above code established based on the key pressing operation by the user matches the code set in the code register CODE and the determination in step S703 is YES, <the operating principle of the embodiment of the present invention As described in the section>, the user has performed a key depression operation for changing the accompaniment pattern. In this case, the processes of steps S704 to S713 described below are selectively executed.

First, in step S704, it is determined which key of the chord indicated by the chord register CODE the new key-on is performed. If it is determined in step S704 that a new key-on has been performed for the root sound of the chord indicated by the chord register CODE, in step S705, the keyboard loading process of step S404 of the main operation flowchart of FIG. RAM109
It is determined whether or not the value of the touch data indicating the key pressing speed stored in the touch register TOUCH (FIG. 2) therein is 64 or more. The touch data can take values from 0 to 127, and the faster the key pressing speed, the larger the touch data value.

In step S705, the touch register TOUCH
If it is determined that the value of the touch data stored in is greater than or equal to 64, that is, if it is determined that the fast key pressing is performed for the root sound, the process in the RAM 109 of FIG. 1 is performed in step S706. Pattern register shown in 2
The flag F1 = 1 is set in the PAT, and the flags at other bit positions are reset to 0. After this process,
The process of the operation flow chart is finished, and another control operation for advancing other automatic accompaniment (not shown) is executed. Specifically, the accompaniment pattern read from the automatic accompaniment memory 104 is changed from the normal pattern to the fill-in pattern of # 1 corresponding to the flag F1 = 1 set in the chord register CODE, and the changed accompaniment pattern is changed. At the following timing, accompaniment sounding control data corresponding to the chord specified in the chord register CODE is generated and set in the sounding control data area provided in the RAM 109. In the control operation for advancing the automatic accompaniment, which is not shown,
The flag F1 = 1 set in CODE is reset when the reading of the fill-in pattern of # 1 to # 1 from the automatic accompaniment memory 104 of FIG. 1 is completed, and as a result, all of the pattern registers PAT are set. When the value of the bit of 0 becomes 0, the automatic accompaniment pattern returns from the fill-in pattern of # 1 to the normal pattern.

In step S705, the touch register TOUCH
When it is determined that the value of the touch data stored in is smaller than 64, that is, when it is determined that the slow key pressing is performed on the root sound, in step S707, the RAM 109 of FIG. Pattern register shown in
The flag F2 = 1 is set in the PAT, and the flags at other bit positions are reset to 0. After this process,
The process of the operation flow chart is finished, and another control operation for advancing other automatic accompaniment (not shown) is executed. Specifically, the accompaniment pattern read from the automatic accompaniment memory 104 is changed from the normal pattern to the fill-in pattern of # 2 corresponding to the flag F2 = 1 set in the code register CODE, and the changed accompaniment pattern is changed. At the following timing, accompaniment sounding control data corresponding to the chord specified in the chord register CODE is generated and set in the sounding control data area provided in the RAM 109. The operation of returning the fill-in pattern of # 2 to the normal pattern after the elapse of a certain time is the same as that of the fill-in pattern of # 1.

If it is determined in step S704 that a new key-on has been performed for the third note of the chord indicated by the chord register CODE, then step S708 is further performed.
Then, it is determined whether or not the value of the touch data stored in the touch register TOUCH in the RAM 109 is 64 or more.

In step S708, the touch register TOUCH
If it is determined that the value of the touch data stored in is greater than or equal to 64, that is, if it is determined that the fast key is pressed for the third sound, the RAM 109 in FIG. Pattern register PAT shown in FIG.
, The flag B1 = 1 is set, and the flags at other bit positions are reset to 0. After this process, the process of the operation flowchart of FIG. 7 is terminated, and another control operation for advancing other particularly unillustrated automatic accompaniment is executed.
Specifically, the accompaniment pattern read from the automatic accompaniment memory 104 is changed from the normal pattern to the chord register CO.
The break pattern of # 1 corresponding to the flag B1 = 1 set in DE is changed, and at the timing according to the changed accompaniment pattern, the accompaniment pronunciation corresponding to the code specified in the code register CODE. Control data is generated and set in the sounding control data area provided in the RAM 109. The operation of returning the fill-in pattern of # 2 to the normal pattern after the elapse of a certain time is the same as that of the fill-in pattern of # 1.

In step S708, the touch register TOUCH
If it is determined that the value of the touch data stored in is smaller than 64, that is, if it is determined that the slow key depression is performed for the third sound, in step S710, the diagram in the RAM 109 of FIG. Pattern register PAT shown in 2
, The flag B2 = 1 is set, and the flags at other bit positions are reset to 0. After this process, the process of the operation flowchart of FIG. 7 is terminated, and another control operation for advancing other particularly unillustrated automatic accompaniment is executed.
Specifically, the accompaniment pattern read from the automatic accompaniment memory 104 is changed from the normal pattern to the chord register CO.
The break pattern of # 2 corresponding to the flag B2 = 1 set in DE is changed, and at the timing according to the changed accompaniment pattern, pronunciation for accompaniment corresponding to the code specified in the code register CODE. Control data is generated and set in the sounding control data area provided in the RAM 109. The operation of returning the fill-in pattern of # 2 to the normal pattern after the elapse of a certain time is the same as that of the fill-in pattern of # 1.

Then, if it is determined in step S704 that a new key-on has been performed for the fifth note of the chord indicated by the chord register CODE, further step S7.
At 11, it is determined whether the value of the touch data stored in the touch register TOUCH in the RAM 109 is 64 or more.

In step S711, the touch register TOUCH
If it is determined that the value of the touch data stored in is greater than or equal to 64, that is, if it is determined that the fast key is pressed for the fifth note, then in step S712, the RAM 109 in FIG. Pattern register PAT shown in FIG.
, The flag E1 = 1 is set, and the flags at other bit positions are reset to 0. After this process, the process of the operation flowchart of FIG. 7 is terminated, and another control operation for advancing other particularly unillustrated automatic accompaniment is executed.
Specifically, the accompaniment pattern read from the automatic accompaniment memory 104 is changed from the normal pattern to the chord register CO.
The ending pattern of # 1 corresponding to the flag E1 = 1 set in DE is changed, and at the timing according to the changed accompaniment pattern, the accompaniment pronunciation corresponding to the code specified in the code register CODE. Control data is generated and set in the sounding control data area provided in the RAM 109. Here, particularly in the control operation for advancing the automatic accompaniment (not shown), the code register CO
The flag E1 = 1 set in the DE is reset when the reading of the ending pattern of # 1 to # 1 for a few measures from the automatic accompaniment memory 104 of FIG. 1 is completed, and at the same time, the operation of the automatic accompaniment is completed. To do.

In step S711, touch register TOUCH
If it is determined that the value of the touch data stored in is smaller than 64, that is, if it is determined that the slow key depression is performed for the fifth note, the process in the RAM 109 of FIG. 1 is performed in step S713. Pattern register PAT shown in 2
, The flag E2 = 1 is set, and the flags at other bit positions are reset to 0. After this process, the process of the operation flowchart of FIG. 7 is terminated, and another control operation for advancing other particularly unillustrated automatic accompaniment is executed.
Specifically, the accompaniment pattern read from the automatic accompaniment memory 104 is changed from the normal pattern to the chord register CO.
The ending pattern of # 2 corresponding to the flag E2 = 1 set in DE is changed, and at the timing according to the changed accompaniment pattern, the pronunciation for the accompaniment corresponding to the code specified in the code register CODE. Control data is generated and set in the sounding control data area provided in the RAM 109. The operation of returning the ending pattern of # 2 to the normal pattern after the elapse of a certain time is the same as that of the ending pattern of # 1.

In the above operation, the automatic accompaniment memory 10
4 indicates which music type of the accompaniment pattern data among the accompaniment patterns of rock, waltz, etc. shown in FIG. 3 is to be read, the operation state of the accompaniment designation key in the function key unit 101 by the user in advance. Is fetched by the function key fetch process of step S402 of the main operation flowchart of FIG. 4, and is determined by calculating the read start address of the automatic accompaniment memory 104 in the function key process of step S403.

[0056]

According to the present invention, it is possible to change the accompaniment pattern for automatic accompaniment in response to, for example, a key depression operation for designating a chord for automatic accompaniment (successive chords are consecutive You can specify it).

Therefore, the user can specify the chord and the accompaniment pattern in the keyboard of the lower keyboard while playing a melody in the keyboard of the upper keyboard, for example. Since it is not necessary to operate, it is possible to simplify the performance operation of the user.

Even when there are many kinds of accompaniment patterns such as fill-in patterns, break patterns, and ending patterns, the operation switches corresponding to the respective patterns are unnecessary on the operation panel, which simplifies the operation panel and reduces the cost of the electronic musical instrument. Can be realized.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing a register group stored in a RAM.

FIG. 3 is a configuration diagram of an automatic accompaniment memory.

FIG. 4 is a diagram showing a main operation flowchart.

FIG. 5 is an operation flowchart of a timer interrupt routine.

FIG. 6 is an operation flowchart of sound source processing.

FIG. 7 is a partial operation flowchart of keyboard processing.

[Explanation of symbols]

 101 Function Key Section 102 Keyboard Section 103 Microcomputer 104 Automatic Accompaniment Memory 105 LPF 106 Amplifier 107 Speaker 108 ROM 109 RAM 110 First Latch 111 Second Latch 112 D / A Converter

Claims (4)

[Claims] 1. A chord designating means for designating a chord, an accompaniment pattern generating means for generating an accompaniment pattern, and an accompaniment pattern produced by the accompaniment pattern generating means when the same chord is successively designated by the chord designating means. An accompaniment pattern changing device comprising: a changing unit that changes a pattern type. 2. The same chord designating means having a plurality of manipulators and designating chords according to the operating states of the plurality of manipulators, accompaniment pattern generating means for generating an accompaniment pattern, and the same chord designating means. When chords are consecutively designated, the accompaniment pattern changing means includes: changing means for changing the type of the accompaniment pattern generated by the accompaniment pattern generating means based on the type of the operated operator. apparatus. 3. A chord designating means having a plurality of manipulators, which designates a chord according to the operating state of the plurality of manipulators, an accompaniment pattern generating means for generating an accompaniment pattern, and the same chord designating means. When chords are consecutively designated, the accompaniment is characterized by comprising: changing means for changing the type of the accompaniment pattern generated by the accompaniment pattern generating means based on a touch when the operator is operated. Pattern change device. 4. A chord designating means having a plurality of manipulators and designating a chord according to an operation state of the plurality of manipulators, an accompaniment pattern generating means for generating an accompaniment pattern, and the same chord designating means. When the chords are continuously specified, the changing unit that changes the type of the accompaniment pattern generated by the accompaniment pattern generating unit based on the type of the operated operator and the touch when the operator is operated. And an accompaniment pattern changing device.