Music – Instruments
Patent
1978-05-01
1980-05-06
Truhe, J. V.
Music
Instruments
84 125, 84 126, 84 127, 364719, 364721, G10H 510, G10H 502
Patent
active
042011051
ABSTRACT:
Linearly binary-coded digital control signals representing specific time segments of musical sounds are used in part to control stepped ramp signal generators in a digital synthesizer which runs continuously on a fixed program. The ramp signals are used to control amplitude and frequency parameters of multiple digital oscillators that produce respective constituent tones of the musical sound segments. The synthesizer is operable in response to time-multiplexed digital control signals for multiple musical voices, one voice portion of which is also being computed in real time for multiplexing with previously computed and stored digital control signals for other voices. The indicated computations are effected by known techniques on a commercially available computer to translate performer-actuated transducer output signals, designating notes of a composition, into the aforementioned binary-coded digital control signals.
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Max V. Mathews, The Technology of Computer Music, 1969, pp. 37-39, 46-53 and 116-120.
Mathews, M. V., "Groove--A Program to Compose, Store and Edit Functions of Time," pp. 715-721, Communications of the ACM, Dec. 1970.
Alles, H. G., "A One-Card 64 Channel Digital Synthesizer," Computer Music Journal, Nov. 1977, pp. 7-9.
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Moorer, J. A., "Signal Processing Aspects of Computer Music--A Survey," Computer Music Journal, Feb. 1977, pp. 4, 5, 32-35.
Beauchamp, J., "The TI 980A Computer-Controlled Music Synthesizer," Proceedings of the Second Annual Music Computation Conference, Nov. 1975, pp. 1, 2, 19-33.
Alles, H. G., "A Hardware Digital Music Synthesizer," Eascon '75 Record, Sep. 1975, pp. 217A-217E.
Bell Telephone Laboratories Incorporated
Feeney William L.
Phelan Charles Scott
Truhe J. V.
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