JPH0749692A - Automatic accompaniment device - Google Patents

Abstract

PURPOSE:To eliminate the necessity of an operator to perform chord conversion processes while inputting accompaniment by converting the chord inputted as an accompaniment pattern into a specific chord which becomes the basis of the accompaniment pattern chord conversion. CONSTITUTION:Accompaniment patterns by prescribed chords are beforehand stored in a storage means. When an arbitrary chord is specified as the accompaniment data for an automatic accompaniment, the accompaniment pattern by the prescribed chord stored in the storage means is converted into an accompaniment pattern with a pitch corresponding to an arbitrary chord and an automatic accompaniment is performed in the automatic accompaniment device. The device is provided with an input means which inputs accompaniment patterns by an arbitrary chord and a conversion means which converts the arbitrary chord inputted by the input means into a prescribed chord and converts the accompaniment by the arbitrary chord into accompaniment pattern by the prescribed chord.

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,
More specifically, the present invention relates to an automatic accompaniment apparatus that improves operability when an operator inputs an arbitrary accompaniment pattern.

[0002]

2. Description of the Related Art Conventionally, when an operator has previously stored an accompaniment pattern of an arbitrary rhythm in an accompaniment pattern memory and then specifies a desired chord by pressing a key as accompaniment data for automatic accompaniment, The accompaniment pattern stored in the accompaniment pattern memory is converted into an accompaniment pattern of the pitch corresponding to the specified chord, and the pitch corresponding to the specified chord causes automatic accompaniment with the rhythm of the accompaniment pattern. Automatic accompaniment devices are known.

For example, as in the musical score shown in FIG. 12A, it is assumed that the accompaniment pattern memory stores the accompaniment pattern by the code "C". At this time,
The designation of a chord by the player's key depression is performed as shown in FIG.
As shown in, if it is “Dm (D minor)”,
“Dm” based on the accompaniment pattern shown in FIG.
The automatic accompaniment as shown in FIG.

That is, the accompaniment pattern is set so as to match the pitch of the designated chord "Dm" (FIG. 12 (b)).
The root tone (root) and the 5th tone (5th) of the accompaniment pattern (FIG. 12A) read out from the memory are raised by a whole tone, and the 3rd tone (3rd) is raised by a semitone.
It will be played like the musical score shown in (c).

[0005]

By the way, in the conventional automatic accompaniment apparatus, as described above, according to the code conversion rules established in each automatic accompaniment apparatus, any chord specified by the operator is accompaniment. Since it is necessary to convert the accompaniment pattern based on the pattern, the accompaniment pattern is set in advance as a basic code for code conversion (as described above, preset for each automatic accompaniment device, for example, “C”). Hereinafter, it is necessary to store a predetermined code, which is the basis of such code conversion, as a "specific code".

[0006] That is, when an accompaniment pattern suitable for a music piece is input when a certain music piece is automatically accompanied, it is necessary to input not a code used for the music piece but a specific code that is the basis of code conversion. was there.

However, it is extremely rare that the chord used for the musical piece matches the specific chord which is the basis of chord conversion. Therefore, if the code used for the music and the specific code do not match, the operator himself converts the code used for the music to the specific code based on the musical knowledge, and then uses the converted specific code. I had to enter an accompaniment pattern.

Therefore, when inputting the accompaniment pattern,
There is a problem that the operator himself has to perform a chord conversion process for converting the chord used for the musical piece into a specific chord, and if the operator does not have musical knowledge about the chord, the accompaniment pattern There was a problem that you could not enter.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to input a chord input as an accompaniment pattern when inputting an accompaniment pattern. To provide an automatic accompaniment apparatus that converts a specific code, which is the basis of code conversion of an accompaniment pattern, to eliminate the need for an operator to perform code conversion processing when inputting an accompaniment pattern. Is.

[0010]

In order to achieve the above object, an automatic accompaniment apparatus according to the present invention stores an accompaniment pattern of a predetermined chord in a storage means in advance, and sets an arbitrary chord as accompaniment data for automatic accompaniment. Is specified, the accompaniment pattern by the predetermined chord stored in the storage means is converted into an accompaniment pattern of a pitch corresponding to the arbitrary chord, and is automatically accompanied by an arbitrary accompaniment device. An input means for inputting an accompaniment pattern; a conversion means for converting the arbitrary chord input by the input means into the predetermined chord; and converting an accompaniment pattern of the arbitrary chord into an accompaniment pattern of the predetermined chord. To have.

Further, in the automatic accompaniment apparatus according to the present invention, when an accompaniment pattern of a predetermined code is stored in the storage means in advance and an arbitrary code is designated as the accompaniment data for automatic accompaniment, the above-mentioned storage means is stored. In an automatic accompaniment apparatus in which the accompaniment pattern of a predetermined chord is converted into an accompaniment pattern of a pitch corresponding to the arbitrary chord and automatically accompanied, an input means for inputting the accompaniment pattern by the arbitrary chord, and the input means Discriminating means for discriminating the arbitrary chord inputted by the above, and converting the arbitrary chord discriminated by the discriminating means into the predetermined chord, and accompaniment pattern by the predetermined chord. And a conversion means for converting into.

[0012]

According to the former aspect of the present invention, an arbitrary chord input by the input means is converted into a predetermined chord by the converting means, and an accompaniment pattern of the arbitrary chord is converted into an accompaniment pattern of the predetermined chord. It will be.

Therefore, when inputting the accompaniment pattern,
The operator does not need to perform code conversion, and operability can be significantly improved.

Further, according to the latter of the present invention, the discriminating means discriminates the arbitrary code inputted by the input means, so that the converting process is carried out by the converting means without the operator discriminating the arbitrary code. be able to.

[0015]

Embodiments of the automatic accompaniment apparatus according to the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an electronic musical instrument having an automatic accompaniment apparatus according to an embodiment of the present invention.

This electronic musical instrument is constructed so that the control of its entire operation is controlled by using a central processing unit (CPU) 10. A predetermined program for controlling the overall operation of the CPU 10 via the bus 12, a code determination data table used for determining a code input by pressing a key of a keyboard device 22 described later, A route offset table and a type that are code conversion tables used when converting a code input by pressing a key of the keyboard device 22 into a preset specific code.
Reads that store the alternation table, etc.
A program memory 14 made up of only memory (ROM) and a random access memory (R) for storing various accompaniment patterns input by key depression of the keyboard device 22.
AM) accompaniment pattern memory 16, a working area 18 composed of a random access memory (RAM) in which various register groups necessary for executing a program are set, and an accompaniment pattern by key depression operation. A keyboard device 22 for inputting an arbitrary chord and a code of accompaniment data for automatic accompaniment based on an accompaniment pattern, and a conversion instruction operator for instructing conversion of the chord input by the keyboard device 22 into a specific code. An operator provided with a root sound input operator for inputting a root sound of a chord input by the keyboard device 22, a chord name input operator for entering a chord name of a chord input by the keyboard device 22, and the like. The section 23 and the tone generator 24 are connected.

Further, the tone generator 24 includes
An amplifier 26 is connected to the amplifier 26, and a speaker 28 is connected to the amplifier 26. The musical tone signal output from the tone generator 24 is emitted from the speaker 28 to the space as a musical tone via the amplifier 26. ing.

The tone generator 24 provides pitch information and key-on information (note-on (No. in MIDI standard) for each musical tone specified by the accompaniment data and the accompaniment pattern stored in the accompaniment pattern memory 16).
te On) information), the musical tone signal input to the amplifier 26 is started in order to emit the musical tone of the pitch from the speaker 28, and the pitch information and the key-off information (in the MIDI standard) are generated. Note Off (Note Of
f) When the information) is received, the generation of the tone signal input to the amplifier 26 is stopped in order to mute the tone of that pitch.

FIG. 2 shows a data table for code discrimination stored in the program memory 14.
This chord discrimination data table is for the table number (table #), the pitch name data (indicating the pitch name of the musical tones constituting the chord) and the chord type (“maj”).
or (major), "7 (seventh)", "minor"
(Minor) ”and other code types. ) ”
“C” is stored as the root sound.

3 and 4, a chord conversion route offset table (FIG. 3) used for converting a chord input by pressing a key of the keyboard device 22 into a preset specific chord, and FIG. The type alternation table (FIG. 4) is shown.

The route offset table shows the offset value "1" as a semitone, for example, if the offset value is "2", it shows two semitones.

Also regarding the type alternation table, the alternation value of each type for each note name indicates "1" as a semitone, for example, 2 if it is "2". It shows a semitone.

Incidentally, FIGS. 3 and 4 show an example in which the specific code is "C7 (C sevens)".

In the above configuration, when the accompaniment pattern is input by an arbitrary chord by the key depression operation of the keyboard device 22, the accompaniment pattern memory 16 stores the keyboard based on the chord conversion processing described below. The accompaniment pattern by the chord input by the key depression operation of the device 22 is converted into the specific chord (as described above, it is “C7” in this embodiment) and stored.

By thus reading the accompaniment pattern memory 16 in which the accompaniment patterns are stored, automatic accompaniment based on the accompaniment data input by the operator is performed.

The operation of the automatic accompaniment apparatus will be described in detail below with reference to the flowchart.

FIG. 5 is a flow chart showing the process of the operator when the process of converting the data input by the key depression operation of the keyboard device 22 into the specific code is performed.

First, in step S502, the operator inputs data by pressing a key on the keyboard device 22.

Next, in step S504, it is determined whether or not to instruct to convert the data input by the keyboard device 22 into a specific code by operating the conversion instruction operator of the operator section 23.

In step S504, the keyboard device 22
When there is no instruction to convert the input data into a specific code (No: N), the processing of the flowchart is ended without performing the subsequent processing in this flowchart. That is, in this case, the data input in step S502 is used as accompaniment data without being converted into a specific code.

On the other hand, if the conversion of the data input by the keyboard device 22 into the specific code is instructed in step S504 (Yes: Y), the process proceeds to step S506, and the code of the data input by the keyboard device 22 is entered. To
The operator will decide if he knows or not.

In step S506, when the operator knows the code of the data input by the keyboard device 22 (Y), the process proceeds to step S508, and the operator himself / herself inputs the code / name of the operator section 23. The child is operated to specify the code of the data input by the keyboard device 22.

When the process of step S508 is completed, the process proceeds to step S510, and the process of converting the code specified in step S508 into a specific code is automatically performed based on the flowchart shown in FIG.

On the other hand, in step S506, if the operator does not know the code of the data input by the keyboard device 22 (N), the process proceeds to step S512 and the route of the code of the data input by the keyboard device 22 is entered. The sound will determine whether the operator knows it or not.

If the operator knows the root note of the chord of the data input by the keyboard device 22 in step S512 (Y), the process proceeds to step S514.
You will need to enter the root sound.

When the process of step S514 is completed, the process proceeds to step S516, and it is possible to automatically determine the chord using the root sound input in step S514.
Determine whether or not.

If the determination result of step S516 is affirmative (Y), that is, if the chord can be automatically discriminated using the root sound, the process proceeds to step S518, and after the chord is decided based on the automatic discrimination. , Further proceeds to step S510.

Then, in step S510, based on the code determined in step S518, similar to the above,
Based on the flowchart shown in FIG. 10, step S5
A process of converting the code determined in 18 into a specific code is automatically performed.

On the other hand, if the result of the determination in step S516 is negative (N), that is, if the chords cannot be automatically discriminated using the root sound, the operation proceeds to step S520, in which the operator himself / herself operates the operator portion 23. The code name input operator is operated to specify the code of the data input by the keyboard device 22.

When the process of step S520 is completed, the process proceeds to step S510, and in the same manner as above, as shown in FIG.
Based on the flowchart shown in, the process of converting the code specified in step S520 into a specific code is automatically performed.

Incidentally, steps S514 to S5
The processing of 18 (processing block II) will be described later in detail with reference to the flowchart of FIG.

If the operator does not know the root note of the chord of the data input by the keyboard device 22 in step S512 (N), step S522.
Then, the process proceeds to and it is determined whether or not the code can be automatically discriminated.

If the determination result of step S522 is affirmative (Y), that is, if the code can be automatically discriminated, the process proceeds to step S524, the code is determined based on the automatic discrimination, and then the process proceeds to step S510. .

Then, in step S510, based on the code determined in step S524, similar to the above,
Based on the flowchart shown in FIG. 10, step S5
The process of converting the code determined in 24 into a specific code is automatically performed.

On the other hand, if the result of the determination in step S522 is negative (N), that is, if the code cannot be automatically discriminated, the operation proceeds to step S526, in which the operator himself / herself operates the operator section 2
Operate the chord name input operator of 3 to
The code of the data input by 2 is specified.

When the process of step S526 is completed, the process proceeds to step S510, and as in the case of FIG.
Based on the flowchart shown in, the process of converting the code specified in step S526 into a specific code is automatically performed.

Incidentally, steps S522 to S5
The processing of 24 (processing block I) will be described later in detail with reference to the flowchart of FIG.

Therefore, the code of the data input by the keyboard device 22 is discriminated and determined by the processing of the flow chart of FIG. If the operator knows the chord of the data input by the keyboard device 22 and the root sound of the chord, the chord is designated (step S508) and the root tone is designated (step S514). As a result, the processing load on the CPU 10 can be reduced, and the processing speed can be increased.

Next, the processing block I will be described in detail with reference to the flowchart of FIG.

In this processing block I, first, in step S602, the data input by the keyboard device 22 is listed up. That is, the tone name data of all the musical tones indicated by the input data are listed up.

When the processing in step S602 is completed, the flow advances to step S604 to set the table number of the code discrimination data table (FIG. 2) to "1",
Preparations are made to perform processing for each table number of the code determination data table sequentially from "table # 1".

When the process of step S604 is completed, the process proceeds to step S606, and the number of times the table indicated by each table number is referred to is cleared to "0" to prepare for the first reference of each table.

When the processing of step S606 is completed, the process proceeds to step S608, and the data of the table indicated by the table number currently being processed and the keyboard device 22.
It is determined whether or not the input data matches the input data. That is, in the case where the processing of the processing block I is started and the process proceeds to step S602 → step S604 → step S606 → step S608, the “table #
It is determined whether or not the data “1” and the data input by the keyboard device 22 match.

If the determination result of step S608 is affirmative (Y), that is, if the data of the table indicated by the table number and the data input by the keyboard device 22 match, step S610 (step S610).
524), it is determined that the root tone is “C” and the chord is the chord of the chord type indicated by the table number, and the process returns to the subsequent steps of the flowchart shown in FIG. Become.

Therefore, for example, when the processing of the processing block I is started and the processing proceeds to step S602 → step S604 → step S606 → step S608, the data of “table # 1” and the data input by the keyboard device 22 are processed. If and match, the code is determined to be "C major".

On the other hand, if the determination result in step S608 is negative (N), that is, if the data of the table indicated by the table number and the data input by the keyboard device 22 do not match, the process proceeds to step S612. , It is determined whether or not the number of times the table indicated by each table number is referred to exceeds “12”.

If the determination result of step S612 is negative (N), that is, if the number of times the table indicated by each table number is referred to does not exceed "12",
In step S614, the values of all note name data in the table designated by the table number are increased by a semitone and stored in the buffer memory in the working area.

When the process of step S614 ends, the process proceeds to step S616, the number of times the table indicated by each table number is referred to is incremented by "1", and then the process proceeds to step S618.

In step S618, step S614 is performed.
Then, it is determined whether or not the value of the note name data stored in the buffer memory of the working area matches the data input by the keyboard device 22.

If the determination result of step S618 is affirmative (Y), that is, if the value of the note name data stored in the buffer memory of the working area in step S614 and the data input by the keyboard device 22 match. Is
It proceeds to step S620.

In step S620 (step S524), the pitch name obtained by incrementing "C" in semitones by the number of times after incrementing by "1" in step S616 is set as the root tone,
It is determined that the code is the code of the code name having the code type indicated by the table number currently being processed.
The process returns to the subsequent processes of the flowchart shown in.

On the other hand, when the determination result of step S620 is negative (N), that is, when the value of the note name data stored in the buffer memory of the working area in step S614 does not match the data input by the keyboard device 22. Then, the process returns to step S612, and the processes of steps S612 to S618 are repeated.

When the number of times after being incremented by "1" in step S616 exceeds "12", the determination result of step S612 becomes affirmative (Y), and the process proceeds to step S622 to set the table number to "1". Increment.

When the process of step S622 is completed, the process proceeds to step S624, and the table number after incrementing by "1" in step S622 exceeds the table number of the last table set in the code discrimination data table. Whether or not it is determined.

The determination result of step S624 is negative (N), that is, the table number after incrementing by "1" in step S622 exceeds the table number of the last table set in the code determination data table. If not, step S606
Returning to step S622, the process after step S606 is repeated for the table indicated by the table number after being incremented by "1" at step S622.

On the other hand, the determination result of step S624 is affirmative (Y), that is, the table number after incrementing by "1" in step S622 is the table number of the last table set in the code determination data table. If the number is exceeded, the process proceeds to step S626, the code cannot be discriminated by the automatic discrimination, and the process returns to step S526 in the flowchart shown in FIG. The input operator is operated to specify the code of the data input by the keyboard device 22.

That is, in the processing of the processing block I described above, the note name data of all the musical tones indicated by the data input by the keyboard device 22 is listed up, and first, "table # 1" of the chord determination data table is listed. If the pitch name data of “” does not match, then “Table # 1”
The note name data of is increased in semitone steps. If they do not match even if they are increased by 12 semitones, "table # 2" is referred to, and similarly, the table indicated by the table number is sequentially increased by 12 semitones.

When the tone name data of the chord discrimination data table and the tone name data of all the musical tones indicated by the data input by the keyboard device 22 match, the chord discrimination data table is sequentially executed. Specified by the root note and chord type by the chord type indicated by the chord number at the end of the reference of the data table and the root note determined by the number of semitones raised Determine the code for the code name.

Then, even if all the code discrimination data tables stored in the program memory 14 are referred to,
If the tone name data of the chord determination data table does not match the tone name data of all the musical tones indicated by the data input by the keyboard device 22, it is determined that automatic determination is impossible, and in step S526, the operation is performed. The person himself / herself operates the code name input operator of the operator section 23 to specify the code of the data input by the keyboard device 22.

FIG. 7 (b) shows the keyboard device 22 shown in FIG.
The process by the process block I when the data shown by the musical score of (a) is input is shown in figure.

That is, first, when the note name data is listed from the data input by the keyboard device 22, the note name data becomes "D", "F", [A] and "C". Then, the above note name data “D”, “F”, [A]
And "C" will be compared with the code discrimination data table.

As a result of such comparison, when the "table # 4" is referred to by the number "2", all of the note name data in the chord discrimination data table and the data input by the keyboard device 22 are displayed. It matches the note name data of the musical sound. Therefore, since the number of times is “2”, the root tone becomes “D” which is two semitones higher than “C”, and since it is “table # 4”, the chord type becomes “m7” and is input by the keyboard device 22. The code of the created data is "Dm
7 (D Minor Seventh) ".

Next, the processing block II will be described in detail with reference to the flowchart of FIG.

In this processing block II, first,
In step S802 (step S514), the root sound of the chord indicated by the data input by the keyboard device 22 is input.

When the process of step S802 is completed, the process proceeds to step S804, and the data input by the keyboard device 22 is listed up. That is, the tone name data of all the musical tones indicated by the input data are listed up.

When the processing in step S804 is completed, the flow advances to step S806 to set the table number of the code discrimination data table (FIG. 2) to "1",
Preparations are made to perform processing for each table number of the code determination data table sequentially from "table # 1".

When the processing of step S806 is completed, the process proceeds to step S808, and the difference between the two is set so that the root note "C" of the note name data in the chord discrimination data table becomes the root note input in step S802. (Less than,
This is called "offset". ) Only code discrimination data
All note name data in the table is raised and stored in the buffer memory of the working area.

Therefore, the root tone of the chord discrimination data table stored in the buffer memory of the above working area matches the root tone input in step S802.

When the processing of step S808 is completed, the process proceeds to step S810, and the table currently being processed stored in the buffer memory of the working area described above.
It is determined whether or not the data in the table indicated by the number and the data input by the keyboard device 22 match. That is, the processing of the processing block II is started, and step S802 → step S804 → step S
In the case of proceeding from 806 → step S808 → step S810, the data of the “table # 1” in the buffer memory of the working area and the keyboard device 22 described above.
It is determined whether or not the input data matches the input data.

If the determination result of step S810 is affirmative (Y), that is, if the data of the table indicated by the table number and the data input by the keyboard device 22 match, the process proceeds to step S812 (518), It is determined that it is the root sound input in step S802 and the chord of the chord type of the chord type indicated by the table number, and the process returns to the subsequent steps of the flowchart shown in FIG.

Therefore, for example, the processing of the processing block II is started, and step S802 → step S804 →
Step S806 → Step S808 → Step S81
In the case of proceeding to 0, if the data of "table # 1" and the data input by the keyboard device 22 match, it is the root note input in step S802 and the chord type is "major". Will be determined to be the code.

On the other hand, if the determination result of step S810 is negative (N), that is, if the data of the table indicated by the table number and the data input by the keyboard device 22 do not match, the process proceeds to step S814. , Increment the table number by "1".

When the process of step S814 is completed, the process proceeds to step S816, and the table number after being incremented by "1" in step S814 exceeds the table number of the last table set in the code discrimination data table. Whether or not it is determined.

The determination result in step S816 is negative (N), that is, the table number after incrementing by "1" in step S814 exceeds the table number of the last table set in the code determination data table. If not, step S808
Returning to step S814, the processes after step S808 are repeated for the table indicated by the table number after being incremented by "1" at step S814.

On the other hand, the determination result in step S816 is negative (N), that is, the table number after incrementing by "1" in step S814 is the table number of the last table set in the code determination data table. If the number is exceeded, the process proceeds to step S818, it is determined that the code cannot be discriminated by the automatic discrimination, and the process returns to step S520 in the flowchart shown in FIG. The input operator is operated to specify the code of the data input by the keyboard device 22.

That is, in the processing of the processing block II described above, the tone name data of all the musical tones indicated by the data input by the keyboard device 22 is listed up, and first, "table # 1" of the chord discrimination data table is listed. If it does not match with this, it is referred to as the note name data of "Table # 2" with the offset amount added. Refer to the table shown in order.

The above-described processing is sequentially performed, and the tone name data of the chord discrimination data table plus the offset amount matches the tone name data of all the musical tones indicated by the data input by the keyboard device 22. When the reference is completed, the reference is terminated after adding the offset to the note name data in the chord discrimination data table, and the chord type indicated by the chord number at the end of the reference and the route entered by the operator. Depending on the sound, the root sound and chord
Determine the code for the code name specified by the type.

The offset value is added to the note name data in the chord discrimination data table and the keyboard device 2 is used.
If the tone name data of all the musical tones indicated by the data input in 2 do not match, it is determined that automatic discrimination is impossible,
The operator himself operates the code name input operator of the operator unit 23 to specify the code of the data input by the keyboard device 22.

FIG. 9B shows the keyboard device 22 shown in FIG.
The process by the process block II in the case where the data shown in the musical score of (a) is input is shown diagrammatically.

That is, first, the root sound is designated as "D" based on the data input by the keyboard device 22. Then, when the note name data of the data input by the keyboard device 22 is listed, the note name data is “D”,
"F", "A" and "C". Therefore, since the root note is "D", the note name data "D", "F",
"A" and "C" will be compared with those obtained by adding the offset amounts of "C" and "D" to the code discrimination data table.

As a result of such a comparison, when the "table # 4" is referred to, the data obtained by adding the offset amount to the note name data in the chord determination data table and the data input by the keyboard device 22 are compared. The tone name data of all the musical tones shown will match. Therefore, "table #
Since the chord type is “m7” because it is “4” and the root sound is “D”, the chord of the data input by the keyboard device 22 must be determined as “Dm7 (D minor sevens)”. become.

Further, the code conversion process (step S510) will be described in detail with reference to the flowchart of FIG.

In this code conversion process, first, in step S
In 1002, step S508 and step S52
0 or the chord input in step S526, or the root note of the chord determined in step S518 (step S812) or step S524 (step S610, step S620), based on the chord conversion table stored in the program memory 14. Inside route
With reference to the offset table (FIG. 3), the offset value for the root sound is obtained.

When the processing of step S1002 is completed,
In step S1004, the offset value obtained in step S1002 is added to the pitches of all the musical tones of the data input by the keyboard device 22. Therefore, for example, if the offset value is "1", the pitch of all the musical tones of the data input by the keyboard device 22 is increased by a semitone.

When the processing of step S1004 is completed,
The process proceeds to step S1006, the code input in step S508, step S520 or step S526, step S518 (step S812) or step S524 (step S610, step S62).
Based on the chord type of the chord determined in 0), referring to the type alternation table (FIG. 4) in the chord conversion table stored in the program memory 14, it is input by the keyboard device 22. Get the alternation values for all tones in the data.

When the processing of step S1006 is completed,
In step S1008, the alternation value obtained in step S1006 is added to all the pitches of the musical tones to which the offset values have been added in step S1004, and the keyboard device 22
The conversion of the code input by the to the specific code ends. As a result, the data input by the keyboard device 22 with an arbitrary chord can be stored in the accompaniment pattern memory 16 as an accompaniment pattern represented by the specific chord.

When the processing of step S1008 is completed,
This flowchart is ended and the process returns to the flowchart of FIG.

In FIG. 11, in step S1002, the code input in step S508, step S520 or step S526, or step S518.
An operation example is shown in which the code determined in (step S812) or step S524 (step S610, step S620) is “Dm7”.

When the chord input by the keyboard device 22 is "Dm7", the root value is "D", so the offset value is "-2" from FIG. 3 (step S1002).

Therefore, the offset value "-2" is changed to "Dm
Adding "D", "F", "A" and "C", which are the constituent sounds of "7", lowers each of these "D", "F", "A" and "C" by two semitones. Becomes
"C", "E flat", "G" and "B flat"
Is obtained (step S1004).

Since the chord input by the keyboard device 22 is "Dm7", the chord type is "m".
7 ”, and from FIG. 4, the alternation value is“ 0 ”for“ C ”,“ 1 ”for“ E flat ”,
“0” is obtained for “G” and “0” is obtained for “B flat” (step S1006).

Then, when the alternation value is added to each pitch, "C", "E", "G" and "B flat" are obtained, and "C7" set as the specific code can be obtained. .

Therefore, the data input by the keyboard device 22 with an arbitrary code can be automatically converted into a specific code and stored in the accompaniment pattern memory 16 as an accompaniment pattern.

[0105]

Since the present invention is constructed as described above, it has the following effects.

When an accompaniment pattern of a predetermined code is stored in the storage means in advance and an arbitrary chord is designated as accompaniment data for automatic accompaniment, the accompaniment pattern of the predetermined code stored in the storage means is converted into an arbitrary chord. In an automatic accompaniment device that is automatically accompanied by converting to a corresponding pitch accompaniment pattern, input means for inputting an accompaniment pattern by an arbitrary chord, and converting any chord input by the input means into a predetermined chord, Since the conversion means for converting an accompaniment pattern of an arbitrary chord into an accompaniment pattern of a predetermined chord is provided, an arbitrary chord input by the input means is converted into a predetermined chord by the conversion means, and an arbitrary chord is generated. Since the accompaniment pattern by will be converted into the accompaniment pattern by the predetermined code, When entering Kanade pattern, it is not necessary to the operator performs code conversion, it is possible to significantly improve operability.

When an accompaniment pattern of a predetermined code is stored in the storage means in advance and an arbitrary code is designated as accompaniment data for automatic accompaniment, the accompaniment pattern of the predetermined code stored in the storage means is arbitrary. In an automatic accompaniment device which is automatically accompaniment converted into an accompaniment pattern of a pitch corresponding to a chord, an input means for inputting an accompaniment pattern by an arbitrary chord, and a discriminating means for discriminating an arbitrary chord inputted by the input means. Since there is provided conversion means for converting the arbitrary chord discriminated by the discriminating means into a predetermined chord and converting an accompaniment pattern of the arbitrary chord into an accompaniment pattern of the predetermined chord, by the discriminating means, by the input means. Since the entered arbitrary code is identified, the operator must identify the arbitrary code. Ku becomes possible to perform the conversion process by converting means.

Therefore, when the accompaniment pattern is input, the automatic accompaniment apparatus of the present invention can convert the chord input as the accompaniment pattern into a specific code that is the basis of the chord conversion of the accompaniment pattern. This has an excellent effect that the operator does not need to perform the code conversion process.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an electronic musical instrument having an automatic accompaniment device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram schematically showing a code discrimination data table stored in a program memory.

FIG. 3 is an explanatory diagram schematically showing a route offset table in a code conversion table stored in a program memory.

FIG. 4 is an explanatory diagram schematically showing a type alternation table in a code conversion table stored in a program memory.

FIG. 5 is a flowchart showing a process of an operator when performing a process of converting data input by a key depression operation of the keyboard device into a specific code.

FIG. 6 is a flowchart showing a routine of processing block I.

FIG. 7 shows an operation example of a processing block I, and FIG.
7B is a musical score of data input by the keyboard device, and FIG. 7B is a diagram schematically showing the processing of the processing block I when the data of the musical score shown in FIG. 7A is input. It is a figure. .

FIG. 8 is a flowchart showing a routine of processing block II.

FIG. 9 shows an operation example of a processing block II, and FIG.
9B is a musical score of the data input by the keyboard device, and FIG. 9B is a diagram schematically showing the processing of the processing block II when the musical score data shown in FIG. 9A is input. It is a figure.

FIG. 10 is a flowchart showing a routine of code conversion processing.

FIG. 11 is an explanatory diagram schematically showing an operation example of code conversion processing.

12A is a musical score of an accompaniment pattern of "C major" stored in an accompaniment pattern memory, and FIG. 12B is a musical score showing a chord of "Dm",
(C) is a musical score showing an accompaniment performed by the automatic accompaniment device.

[Explanation of symbols]

 10 CPU 12 Bus 14 Program Memory (ROM) 16 Accompaniment Pattern Memory (RAM) 18 Working Area (RAM) 22 Keyboard Device 23 Operator Section 24 Tone Generator 26 Amplifier 28 Speaker

Claims (2)

[Claims] 1. When an accompaniment pattern of a predetermined code is stored in a storage unit in advance and an arbitrary code is designated as accompaniment data for automatic accompaniment, the accompaniment pattern of the predetermined code stored in the storage unit is , An automatic accompaniment device which is automatically accompanied by converting into a pitch accompaniment pattern corresponding to the arbitrary chord, input means for inputting an accompaniment pattern by an arbitrary chord, and the arbitrary chord input by the input means Is converted into the predetermined chord, and the accompaniment pattern of the arbitrary chord is converted into an accompaniment pattern of the predetermined chord. 2. An accompaniment pattern according to a predetermined code stored in the storage means when an accompaniment pattern according to a predetermined code is stored in advance in storage means and an arbitrary code is designated as accompaniment data for automatic accompaniment. , An automatic accompaniment device which is automatically accompanied by converting into a pitch accompaniment pattern corresponding to the arbitrary chord, input means for inputting an accompaniment pattern by an arbitrary chord, and the arbitrary chord input by the input means And a conversion unit that converts the arbitrary chord discriminated by the discrimination unit into the predetermined chord and converts an accompaniment pattern of the arbitrary chord into an accompaniment pattern of the predetermined chord. An automatic accompaniment device characterized by the above.