JPH06282268A - Automatic accompanying device - Google Patents

Abstract

PURPOSE:To provide a chord accompaniment having individual sounds possessed by various music genres or peculiar sounds according to music scenes. CONSTITUTION:A control part 4 refers to a chord constituting sound converting table 5 on the basis of chord name information detected by a chord discriminating part 2 and designated rhythm information designated by a rhythm designating part 3, and converts given chord constituting sound data into the data of chord constituting sound characteristic of a designated rhythm. When indication of a chord accompaniment based on a fill-in accompaniment pattern is given by a fill-in indication part 7, the control part refers to a chord constituting sound converting table 6 on the basis of the chord name information and the designated rhythm information, and converts the given chord constituting sound data into the data of a chord constituting sound fit for a designated rhythm.

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.

[0002]

2. Description of the Related Art An automatic accompaniment apparatus in a conventional electronic musical instrument detects a chord type (chord type) and a root note name from information on a key depression operation on a keyboard, and detects a predetermined frequency (pitch) corresponding to the detected information. The difference value) is added to the reference note data (for example, created based on C major) to obtain the chord data (chord pronunciation data) required for pronouncing the chord accompaniment sound, and is designated based on this chord data. It is configured to generate chord accompaniment sounds of different tones at a specified rhythm.

[0003]

In the conventional automatic accompaniment apparatus configured as described above, regardless of whether the rhythm specified at that time is jazz or waltz, etc., the chord to be produced is reproduced. There was no change in the constituent sounds (only the rhythm was different), and they were all the same. For this reason,
The resulting chord accompaniment was simple and lacked in musicality.

Therefore, the present invention provides an automatic accompaniment device with rich musicality that can express the unique sounds of various music genres and the unique sounds according to the scene (excitement) of a song. With the goal.

[0005]

The present invention provides an automatic accompaniment apparatus for performing chord accompaniment based on an automatic accompaniment pattern,
Chord discriminating means for detecting the designated chord name, rhythm designating means for designating the rhythm of the chord accompaniment sound, chord name information detected by the chord discriminating means, and rhythm designated by the rhythm designating means Chord constituent sound conversion means for converting the given chord constituent sound data into chord constituent sound data specific to the rhythm designated by the rhythm designating means using the information, and a chord constituent obtained from the chord constituent sound converting means. Based on the sound data,
Sound generating means for generating a chord accompaniment sound at a rhythm designated by the rhythm designating means are provided.

The automatic accompaniment pattern may be a fill-in accompaniment pattern for producing an accompaniment sound of a short phrase.

[0007]

According to the present invention configured as described above, the chord component sound converting means is provided based on the chord name information detected by the chord discriminating means and the rhythm information designated by the rhythm designating means. Since the chord component sound data is converted into the chord component sound data specific to the designated rhythm, and the sounding means is made to sound the chord accompaniment sound of the designated rhythm based on the converted chord component sound data,
It is possible to obtain chord accompaniment with a musical sound unique to each rhythm (music genre) such as jazz, waltz, and tango. Further, even when the performer instructs the automatic accompaniment based on the fill-in accompaniment pattern in order to obtain the excitement of the music, the short phrase accompaniment that matches the rhythm specified at that time can be obtained.

[0008]

1 shows the basic structure of an automatic accompaniment apparatus according to an embodiment of the present invention, and FIG. 2 shows the overall structure of an electronic musical instrument incorporating the automatic accompaniment apparatus of the embodiment.

In the electronic musical instrument of this embodiment, a microcomputer produces accompaniment tones such as melody, chords, and drums.

The bus 10 includes a keyboard section 12, an operation panel section 14, a tone generation circuit 16, a CPU 18, a program / data ROM 20, a RAM 22, and a pedal operation section 2.
8 is connected. When the performer operates a key of the keyboard section 12, the CPU 18 detects a key number, a key pressing timing, a key pressing speed, etc. based on a key scan program written in the ROM 20, and outputs the corresponding tone data to the tone generating circuit 1.
6 is derived. The tone generation circuit 16 is a tone color (instrument type) selected by operating the key number of the operated key and the tone color designating operator 14a provided on the operation panel unit 14.
Based on the above, the sound source data is read from a waveform ROM (not shown), the amplitude and envelope of the read sound source data are processed, converted into an analog signal, and output to the amplifier 24. The output signal of the amplifier 24 is given to the speaker 26, and the performance sound for melody is generated.

The CPU 18 also outputs automatic accompaniment pattern data (data indicating a pronunciation pattern of an accompaniment sound) corresponding to a rhythm such as jazz, rock, or tango selected by the rhythm designating operator 14b provided on the operation panel section 14. While reading from the ROM 20, data of an accompaniment tone to be generated is obtained based on chord (chord) information detected from a key operation on the keyboard unit 12. Then, this accompaniment sound data is supplied to the musical sound generation circuit 16, where a corresponding accompaniment sound signal is formed based on the sound source data in the waveform ROM, and given from the amplifier 24 to the speaker 26.

In the basic configuration of FIG. 1, pattern data for automatic accompaniment is stored in the basic accompaniment pattern storage unit 1, and a desired pattern is selected by a rhythm designating operator 14b provided in the operation panel unit 14. Done by.

The chord discriminating section 2 detects chord names designated by a key depression operation on the keyboard section 12, and chord name information consisting of chord type (major, minor, sevens, etc.) and chord root (root note) information. To the control unit 4. Accompaniment chord type (major, minor, sevens, etc.) and root note name (C, D, E
.. etc.) is disclosed in Japanese Patent Publication No. 1-377.
58, JP-A-63-80299, and the like. A program for detecting the chord type and root name is written in the ROM 20.

The chord component sound conversion table 5 stores chord component sound data (key number information) corresponding to the chord name detected by the chord discriminating section 2 into the rhythm designating operator 14b.
Is a data conversion table for converting into data of chord-constituting sounds peculiar to the rhythm designated by the rhythm designating unit 3 configured as follows. As shown in FIG. 3, this table is provided for each rhythm such as jazz and waltz. Being prepared.

The contents of the chord component sound conversion table 5 will be described in detail with reference to the examples shown in FIGS.
That is, in an electronic musical instrument such as a keyboard, for example, FIG.
When trying to play a melody as shown in (a),
The basic chord accompaniment (chord) at that time is shown in FIG.
It is possible to add a chord to the bass clef part by a left-handed operation as shown in (b).

Here, the C ₇ code at the third bar in FIG. 5B will be focused on and explained with this C ₇ code as an example.
The C ₇ chord is an arrangement of sounds based on the most basic scale as shown in FIG. However, in the field of jazz, for example, chords based on a scale as shown in FIG. 7 are actually used very much.
Therefore, in order to obtain a chord accompaniment having a more jazz-like sound, it is desirable to pronounce the C ₇ chord having the sound arrangement shown in FIG. 8 based on the scale shown in FIG. 7. Also, in the field of each music genre such as waltz, Latin, and tango, since many chords based on their respective scales are used, in order to obtain a chord accompaniment with a sound that matches the mood of each music genre, It is desirable to pronounce chords specific to the music genre.

Therefore, this chord component sound conversion table 5
In consideration of the chord composition peculiar to each music genre (rhythm) as described above, the chord constituent sound data obtained from the keyboard section 12 or the chord discrimination section 2 is designated according to the rhythm designated at that time. It is structured so that it can be converted into chord constituent sound data that matches the scale specific to the rhythm.

Since the chord having the arrangement of the sounds as shown in FIG. 8 includes both the major third and minor third constituent to the root note, it is sounded by the conventional automatic accompaniment apparatus. It was something I couldn't do. This is because the conventional chord discrimination is performed based on whether the 3rd sound with respect to the root sound is a 3rd major sound or a 3rd minor sound. This is because even a chord having a structure including both three-tone sounds will be discriminated as a chord including only one of the three-tone sounds. Therefore, as in the present embodiment, the constituent sound data of the chord-determined chord is
By converting to the data of the chord component sound peculiar to the designated rhythm by referring to the table 5 and then generating the sound, it is possible to generate the chord having the structure including both the major third and minor third notes. become able to.

Fill-in chord component sound conversion table 6
Is a foot switch 28 provided on the pedal operating unit 28.
If the chord accompaniment based on the accompaniment pattern of a short phrase called fill-in stored in the fill-in accompaniment pattern storage unit 8 is instructed by the fill-in instruction unit 7 configured by a, the rhythm specified at that time 4 is a data conversion table for converting the data of the chord component sound discriminated by the chord discriminating unit 2 into the data of the chord component sound peculiar to the designated rhythm. As shown in FIG. 4, jazz, waltz, etc. This table is prepared for each rhythm.

This fill-in accompaniment pattern has a sounding pattern different from that of a normal automatic accompaniment pattern, and is designed so that it is possible to obtain a unique effect such as musical excitement. Alternatively, when the performer gives an instruction to play the fill-in accompaniment pattern by operating the pedal in the pedal operating unit 28 in a portion corresponding to the excitement of the piece, the fill-in pattern suitable for the scene of the piece is played.

Note that, for example, the C ₇ code has the character of proceeding to the F _m7 code which is a minor seventh code of 5 degrees below, as shown in FIG. That is, C ₇
→ The chord progression of F _m7 can be considered as one set. Therefore, when the accompaniment sound based on the fill-in accompaniment pattern is to be sounded, the player operates the foot switch 28a at the sounding timing of the C ₇ chord before the F _m7 chord during the chord progression. converts the C ₇ code chord member data chord member data fill-specific C ₇ code may be caused to be pronounced.

The control unit 4 controls the operation of the entire automatic accompaniment apparatus, performs conversion processing of chord constituent sounds using the tables 5 and 6 described above, and converts the converted chord constituent sound data to the tone generation circuit 16 Send to. Music generation circuit 16
Is based on the given chord constituent tone data (key number) and information such as the tone color obtained from the operation panel unit 14,
Generate a corresponding accompaniment sound signal. The basic accompaniment pattern storage unit 1, the chord component sound conversion tables 5 and 6,
The fill-in accompaniment pattern storage unit 8 includes a ROM 20, the chord determination unit 2 and the control unit 4 include a CPU 18,
It is configured by a microcomputer system including a ROM 20 and a RAM 22.

FIG. 10 is a flow chart showing the procedure of the chord pronunciation process executed by the CPU 18.
In this process, first, in step S1, the chord identifying portion 2 detects the chord name information designated by the key depression operation of the keyboard portion 12, and then in step S2, the rhythm information designated by the rhythm designating portion 3 is read. Next, the control unit 4
In step S3, it is detected whether or not the fill-in instructing unit 7 has instructed the pronunciation of the accompaniment sound of the fill-in accompaniment pattern. Here, when the instruction to pronounce the accompaniment sound of the fill-in accompaniment pattern is detected, the fill-in chord component sound conversion table 6 is referred to in step S4, and the keyboard section is generated based on the chord name information and the rhythm information obtained in steps S1 and S2. The chord component sound data obtained from 12 is converted into the chord component sound data specific to fill-in. If the instruction to pronounce the accompaniment sound of the fill-in accompaniment pattern is not detected in step S3, the chord component sound is not converted in step S4 and the process proceeds to step S5.

In step S5, the chord component sound conversion table 5 is referred to based on the chord name information obtained from the chord discrimination unit 2 and the designated rhythm information obtained from the rhythm designation unit 3, and the chord component sound data obtained from the keyboard unit 12 is referred to. Is converted into chord component sound data specific to the designated rhythm. In step S6, in the control unit 4 and the tone generation circuit 16,
Signal processing is performed to cause each of the chord constituent tones designated by the chord constituent tone data obtained in step S4 or step S5 to have a designated rhythm and tone color, and a corresponding chord accompaniment sound is produced from the speaker 26. To be done.

As described above, according to the above-described embodiment, it has a musical sound very close to the atmosphere of the designated music genre (jazz, waltz, latin, tango, etc.) and responds to the excitement of the music. It is possible to add chords and obtain a more musical automatic chord accompaniment.

In the above embodiment, one of the chord constituent sound conversion tables 5 and 6 is referred to according to whether or not there is an instruction to play the fill-in accompaniment pattern, and the chord constituent obtained from the keyboard section 12 is referred to. The case where the chord conversion is executed based on the sound data has been described.
0 is performed immediately before the determination of the fill-in instruction shown in step S3 using the table 5 shown in step S5, and when the instruction to play the fill-in accompaniment pattern is given, this table 5 is used. The converted chord component sound data may be converted into a chord component sound peculiar to fill-in based on the converted chord component sound data.

In addition to the timing data, an automatic accompaniment pattern including note data such as a key number created based on C major is used, and the note data is read out at a given tempo speed while the keyboard section 12 is read.
Chord expansion based on the chord type and root note name detected from key operation etc. in the chord is performed, and chord constituent tone data obtained in this way is converted into chord constituent tones according to each rhythm as described above. You may make it sound.

The chord may be designated by operating a key specifically assigned to the keyboard section 12 for chord designation. Further, the chord is not written in the keyboard section 12 but written in the ROM 20. The chord progression pattern shown in FIG. 5B, for example, may be automatically used.

[0029]

As described above, according to the automatic accompaniment apparatus of the present invention, it is possible to perform chord accompaniment by the chord component sound peculiar to the specified rhythm, so that each rhythm (music genre) such as jazz, rock, and waltz. A chord accompaniment rich in music with a sound closer to that of can be obtained. Further, when the performer gives a performance instruction based on the accompaniment pattern of a short phrase, it is possible to obtain a chord accompaniment having a musical sound and excitement of the music in accordance with the rhythm selected at that time.

[Brief description of drawings]

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

FIG. 2 is an overall configuration diagram of an electronic musical instrument in which the automatic accompaniment device of the present embodiment is incorporated.

FIG. 3 is a conceptual diagram showing the contents of a chord component sound conversion table.

FIG. 4 is a conceptual diagram showing the contents of a fill-in chord component sound conversion table.

FIG. 5 is a diagram showing an example of a relationship between a certain melody and its chord.

FIG. 6 is a diagram showing the pitch relationship of each sound based on the most basic scale.

FIG. 7 is a diagram showing a pitch relationship between notes based on a scale peculiar to jazz.

FIG. 8 is a diagram showing a chord structure in the case where the C ₇ chord shown in FIG. 5 (b) is converted into a constitution according to a scale peculiar to jazz.

FIG. 9 is a diagram showing an example of chord progressions.

FIG. 10 is a flowchart showing a processing procedure of chord pronunciation processing executed by a CPU.

[Explanation of symbols]

 1 Basic Accompaniment Pattern Storage Section 2 Chord Discrimination Section 3 Rhythm Designating Section 4 Control Section 5 Chord Constitution Sound Conversion Table 6 Fill-in Chord Composition Sound Conversion Table 7 Fill-in Instruction Section 8 Fill-in Accompaniment Pattern Storage Section 10 Bus 12 Keyboard Section 14 Operation Panel Section 14a Tone designation operator 14b Rhythm designation operator 16 Musical tone generation circuit 18 CPU 20 ROM 22 RAM 24 Amplifier 26 Speaker 28 Pedal operation part 28a Foot switch

Claims (2)

[Claims] 1. An automatic accompaniment device for performing chord accompaniment based on an automatic accompaniment pattern, chord discrimination means for detecting a designated chord name, rhythm designating means for designating a rhythm of the chord accompaniment sound, and the chord. Using the chord name information detected by the discriminating means and the rhythm information designated by the rhythm designating means, the given chord constituent sound data is converted into chord constituent sound data specific to the rhythm designated by the rhythm designating means. And a sound generating means for generating a chord accompaniment sound at a rhythm designated by the rhythm designating means based on the chord constituent sound data obtained from the chord constituent sound converting means. Automatic accompaniment device. 2. The automatic accompaniment apparatus according to claim 1, wherein the automatic accompaniment pattern is a fill-in accompaniment pattern for producing a short phrase accompaniment sound.