Interactive music composition and performance system

• US 4,526,078 A
• Filed: 09/23/1982
• Issued: 07/02/1985
• Est. Priority Date: 09/23/1982
• Status: Expired due to Fees

• Current Assignee: Intelligent Computer Music Systems
• Original Assignee: Joel Chadabe
• Inventors: Chadabe, Joel
• Primary Examiner(s): Isen, Forester W.
• Application Number:
  US06/421,900
• Time in Patent Office: 1,013 Days
• Field of Search: 84/1.03, 84/1.24, 84/DIG. 12, 84/1.01, 84/1.19, 84/1.27
• US Class Current: 84/602
• CPC Class Codes: G10H 1/0551 using variable capacitors
• CPC Class Codes: G10H 1/0556 using piezoelectric means
• CPC Class Codes: G10H 1/26 for automatically producing a series of tones

Abstract

An interactive music composition and performance system is a real-time composing and sound-producing system which employs a synthesizer, a programmable computer, and at least one performance device and which functions automatically to generate controls which determine the course of the musical composition it plays as well as the nature of the sound it produces. The system is interactive in that a user can direct aspects of the system'"'"'s production of music, as he or she hears it being produced, by use of a performance device. If the user does not provide an input, the system proceeds automatically to compose music and produce sound.

Claims

1. Interactive method of generating music employing a synthesizer;

a programmable computer coupled to said synthesizer and capable of storing and running a program containing a music and sound control algorithm for generating music and sound control data in real time to be provided to said synthesizer and a performance algorithm for generating and interpreting performance control data; and

at least one human-performer input device producing a signal in response to a physical music-performing gesture by a human performer;

comprising the steps of;

generating said music and sound control data in said computer to produce an ongoing, real-time, at least partially non-predeterminable musical composition;

automatically supplying said music and sound control data from said computer to said synthesizer in accordance with said performance algorithm;

scanning the signal from said human-performer input device at periodic intervals to determine whether said human performer is performing said gesture;

if said signal indicates occurrence of said music-performance gesture, then altering said automatic performance algorithm in accordance with said signal and supplying said performance control data according to the altered performance algorithm; and

producing audible music from said synthesizer, as determined by said performance, music, and sound control data, as audible feedback to said performer.

2. Interactive method of generating music according to claim 1;

wherein said performance algorithm includes a pseudorandom number generator subroutine, and decisions concerning generation of said performance control data are carried out by said subroutine when said signal indicates the non-occurence of said music-performing gesture.

3. Interactive method of generating music according to claim 1;

further comprising

altering said music and sound control data in accordance with the signal produced in said device, if the scanned signal indicates the occurrence of said music-performing gesture.

4. Interactive method of generating music employing a synthesizer;

a programmable computer; and

at least one performance device;

said synthesizer, computer, and device operating together as a real-time composing and sound-producing system operative with a human performer, the method comprising the steps of;

automatically generating composition control data in said computer, which composition control data determine in real time the course of an ongoing musical composition such that aspects of the music are non-predeterminable;

applying these composition control data to the synthesizer to affect the latter'"'"'s operation;

generating sound in the synthesizer in accordance with the composition control data applied to it;

generating performance control data in the performance device in response to control gestures of the performer with the device; and

applying said performance control data to said computer to control at least certain aspects of the musical composition in conjunction with the composition control data that are automatically generated in the computer, such that the performer can influence the course of the ongoing musical composition by selecting his or her next peformance gesture in response to the aspects of the generated music determined by the composition control data automatically generated by the computer.

5. Interactive method of generating music according to claim 4;

wherein said automatically generated composition control data control pitch, harmony, rhythm, and balance between voices;

while said performance control data determine temp and timbre.

6. Interactive method of generating music according to claim 4;

wherein said performance device includes a hand-capacitance sensor, and said performance control data are generated by varying the proximity of a portion of the performer'"'"'s body to said sensor.

7. Interactive method of generating music according to claim 4;

wherein said performance device includes a touch-sensitive plate for generating a first control signal on impact and other control signals in accordance with the position on said touch-sensitive plate where the impact occurs;

said other control signals being generated on impact.

8. Interactive method of generating music according to claim 4;

wherein said programmable computer includes pseudorandom number generator means for generating said performance control data in the absence of said performance gestures of the performer.

9. Interactive method of generating music according to claim 4;

further comprising, in the case of non-occurrence of a control gesture by said performer, automatically generating said performance control data.

10. Interactive music generation and performance apparatus comprising at least one performance device;

a synthesizer; and

a programmable computer;

said device, said synthesizer, and said computer operating together as a real-time performing and composing system both with and without a human peformer;

wherein said performance device includes means for generating performance control data, if the performer is present, in response to control gestures of the performer with the device;

wherein said synthesizer includes means for generating sound in accordance with composition control data applied to it; and

wherein said programmable computer includes (1) means for automatically generating said composition control data in real time, which composition control data determine the course of an ongoing musical composition with non-predeterminable aspects, (2) means for applying these composition control data to the synthesizer to affect the latter'"'"'s operation, (3) means for applying said performance control data to said composition control data generating means to influence at least certain aspects of the ongoing musical composition in conjunction with the composition control data that are being automatically generated, such that the performer can affect the course of the ongoing musical composition by selecting his or her next performance gesture in response to the aspects of the generated music determined by the composition control data automatically being generated, and (4) means for automatically generating said performance control data in the absence of any performance gesture of the performer so that the composition is produced automatically even in the absence of a control gesture executed by a performer.

11. Interactive music generation and performance apparatus according to claim 10;

wherein said automatically generated composition control data control pitch, harmony, rhythm, and balance between voices;

while said performance control data determine tempo and timbre.

12. Interactive music generation and performance apparatus according to claim 10;

wherein said performance device includes a capacitance sensor, and said performance control data are generated by varying the proximity to said sensor of a portion of the performer'"'"'s body.

13. Interactive music generation and performance apparatus according to claim 10;

wherein said means for generating said composition control data in real time includes pseudorandom number generator means.

14. Interactive music generation and performance apparatus according to claim 10;

wherein said means for automatically generating said performance control data in the absence of any performance gesture includes pseudorandom number generator means for generating said performance control data in the absence of said performance gestures.