ACCOMPANIMENT DATA GENERATING APPARATUS

• US 20150228260A1
• Filed: 04/20/2015
• Published: 08/13/2015
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: OKAZAKI, Masatsugu, KAKISHITA, Masahiro
• Granted Patent: US 9,536,508 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G10H 1/00 Details of electrophonic musical instruments
• CPC Class Codes: G10H 1/02 Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
• CPC Class Codes: G10H 1/28 to produce arpeggios
• CPC Class Codes: G10H 1/38 Chord
• CPC Class Codes: G10H 2210/00 Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
• CPC Class Codes: G10H 2210/576 Chord progression
• CPC Class Codes: G10H 2240/145 Sound library, i.e. involving the specific use of a musical database as a sound bank or wavetable; indexing, interfacing, protocols or processing therefor
• CPC Class Codes: G10H 2250/541 Details of musical waveform synthesis, i.e. audio waveshape processing from individual wavetable samples, independently of their origin or of the sound they represent
• CPC Class Codes: G10H 7/02 in which amplitudes at successive sample points of a tone waveform are stored in one or more memories

Abstract

An accompaniment data generating apparatus has a storing portion 15 for storing sets of phrase waveform data each related to a chord identified on the basis of a combination of chord type and chord root, and a CPU 9. The CPU 9 carries out a chord information obtaining process for obtaining chord information by which a chord type and a chord root are identified, and a chord note waveform data generating process for generating phrase waveform data indicative of chord notes of the chord root and the chord type identified by the obtained chord information in accordance with the obtained chord information by use of the sets of phrase waveform data stored in the storing portion 15, and outputting the generated data as accompaniment data.

Claims

1. An accompaniment data generating apparatus comprising:

a storing portion for storing a set of automatic accompaniment data having a plurality of accompaniment parts and comprising sets of phrase waveform data respectively correlated with a plurality of chord type provided for each accompaniment part, each set of phrase waveform data indicative of musical tones corresponding to accompaniment correlated with a chord identified on the basis of a combination of chord type and chord root, each set of phrase waveform data having an identifier which is used as chord type information for identifying chord type and chord root information for identifying chord root;

a chord information obtaining portion for obtaining chord information which identifies chord type and chord root;

a reading portion for reading out, from the storing portion, sets of phrase waveform data having chord type information which corresponds to a chord type specified by the obtained chord information, each set of phrase waveform data corresponding to each accompaniment part;

a generating portion for generating the read out sets of phrase waveform data as sets of accompaniment data.

2. The accompaniment data generating apparatus according to claim 1, wherein the generating portion includes a pitch-shifting portion for pitch-shifting the read out sets of phrase waveform data in accordance with a difference in tone pitch between a chord root identified on the basis of the obtained chord information and a chord root identified by the chord root information of the read out sets of phrase waveform data, and

the generating portion generates the pitch shifted sets of phrase waveform data as sets of accompaniment data.

3. The accompaniment data generating apparatus according to claim 1 further comprising:

a chord setting portion for setting chord information set as a current chord as a previous chord and thereafter setting the chord information obtained by the chord information obtaining portion as the current chord; and

a determining portion for determining whether the chord information set as the current chord is the same as the chord information set as the previous chord;

wherein

the reading portion reads out, from the storing portion, sets of phrase waveform data having chord type information which corresponds to a chord type specified by the chord information set as the current chord, when the determining portion determines the chord information set as the current chord is not the same as the chord information set as the previous chord.

4. An accompaniment data generating apparatus comprising:

a storing portion for storing a set of automatic accompaniment data comprising sets of phrase waveform data respectively correlated with a plurality of chord type provided for at least one accompaniment part and sets of accompaniment phrase data respectively correlated with a plurality of chord type provided for other accompaniment part, each set of phrase waveform data indicative of musical tones corresponding to accompaniment correlated with a chord identified on the basis of a combination of chord type and chord root, each set of phrase waveform data having an identifier which is used as chord type information for identifying chord type and chord root information for identifying chord root, each set of accompaniment phrase data indicative of musical performance corresponding to accompaniment correlated with a chord identified on the basis of a combination of chord type and chord root, each set of accompaniment phrase data having an identifier which is used as chord type information for identifying chord type and chord root information for identifying chord root;

a chord information obtaining portion for obtaining chord information which identifies chord type and chord root;

a reading portion for reading out, from the storing portion, a set of phrase waveform data or a set of accompaniment phrase data having chord type information which corresponds to a chord type specified by the obtained chord information, each set of phrase waveform data or each set of accompaniment phrase data corresponding to each accompaniment part;

a generating portion for generating the read out set of phrase waveform data or set of accompaniment phrase data as a set of accompaniment data.

5. The accompaniment data generating apparatus according to claim 4, wherein

the generating portion includes a pitch-shifting portion for pitch-shifting the read out set of phrase waveform data in accordance with a difference in tone pitch between a chord root identified on the basis of the obtained chord information and a chord root identified by the chord root information of the read out set of phrase waveform data, and

the generating portion generates the pitch-shifted set of phrase waveform data as a set of accompaniment data.

6. The accompaniment data generating apparatus according to claim 4, further comprising:

a chord setting portion for setting chord information set as a current chord as a previous chord and thereafter setting the chord information obtained by the chord information obtaining portion as the current chord; and

a determining portion for determining whether the chord information set as the current chord is the same as the chord information set as the previous chord;

wherein

the reading portion reads out, from the storing portion, a set of phrase waveform data or a set of accompaniment phrase data having chord type information which corresponds to a chord type specified by the chord information set as the current chord, when the determining portion determines the chord information set as the current chord is not the same as the chord information set as the previous chord.

7. A computer-readable medium storing a computer program applicable to an accompaniment data generating apparatus including a storing portion for storing a set of automatic accompaniment data having a plurality of accompaniment parts and comprising sets of phrase waveform data respectively correlated with a plurality of chord type provided for each accompaniment part, each set of phrase waveform data indicative of musical tones corresponding to accompaniment correlated with a chord identified on the basis of a combination of chord type and chord root, each set of phrase waveform data having an identifier which Is used as chord type information for identifying chord type and chord root information for identifying chord root, the computer program comprising the steps of:

a chord information obtaining step for obtaining chord information which identifies chord type and chord root;

a reading step for reading out, from the storing portion, sets of phrase waveform data having chord type information which corresponds to a chord type specified by the obtained chord information, each set of phrase waveform data corresponding to each accompaniment part;

a generating step for generating the read out sets of phrase waveform data as sets of accompaniment data.

8. The computer-readable medium according to claim 7, wherein

the generating step includes a pitch-shifting step for pitch-shifting the read out sets of phrase waveform data in accordance with a difference in tone pitch between a chord root identified on the basis of the obtained chord information and a chord root identified by the chord root information of the read out sets of phrase waveform data, and

the generating step generates the pitch-shifted sets of phrase waveform data as sets of accompaniment data.

9. The computer-readable medium according to claim 7, the computer program further comprising:

a chord setting step for setting chord information set as a current chord as a previous chord and thereafter setting the chord information obtained by the chord information obtaining step as the current chord; and

a determining step for determining whether the chord information set as the current chord is the same as the chord information set as the previous chord;

wherein

the reading step reads out, from the storing portion, sets of phrase waveform data having chord type information which corresponds to a chord type specified by the chord information set as the current chord, when the determining step determines the chord information set as the current chord is not the same as the chord information set as the previous chord.

10. A computer-readable medium storing a computer program applicable to an accompaniment data generating apparatus including a storing portion for storing a set of automatic accompaniment data comprising sets of phrase waveform data respectively correlated with a plurality of chord type provided for at least one accompaniment part and sets of accompaniment phrase data respectively correlated with a plurality of chord type provided for other accompaniment part, each set of phrase waveform data indicative of musical tones corresponding to accompaniment correlated with a chord identified on the basis of a combination of chord type and chord root, each set of phrase waveform data having an identifier which is used as chord type information for identifying chord type and chord root information for identifying chord root, each set of accompaniment phrase data indicative of musical performance corresponding to accompaniment correlated with a chord identified on the basis of a combination of chord type and chord root, each set of accompaniment phrase data having an identifier which is used as chord type information for identifying chord type and chord root information for identifying chord root, the computer program comprising the steps of:

a chord information obtaining step for obtaining chord information which identifies chord type and chord root;

a reading step for reading out, from the storing portion, a set of phrase waveform data or a set of accompaniment phrase data having chord type information which corresponds to a chord type specified by the obtained chord information, each set of phrase waveform data or each set of accompaniment phrase data corresponding to each accompaniment part;

a generating step for generating the read out set of phrase waveform data or set of accompaniment phrase data as a set of accompaniment data.

11. The computer-readable medium according to claim 10, wherein

the generating step includes a pitch-shifting step for pitch-shifting the read out set of phrase waveform data in accordance with a difference in tone pitch between a chord root identified on the basis of the obtained chord information and a chord root identified by the chord root information of the read out set of phrase waveform data, and

the generating step generates the pitch-shifted set of phrase waveform data as a set of accompaniment data.

12. The computer-readable medium according to claim 10, the computer program further comprising:

a chord setting step for setting chord information set as a current chord as a previous chord and thereafter setting the chord information obtained by the chord information obtaining step as the current chord; and

a determining step for determining whether the chord information set as the current chord is the same as the chord information set as the previous chord;

wherein

the reading step for reads out, from the storing portion, a set of phrase waveform data or a set of accompaniment phrase data having chord type information which corresponds to a chord type specified by the chord information set as the current chord, when the determining step determines the chord information set as the current chord is not the same as the chord information set as the previous chord.