Electronic musical instrument

Details Electronic musical instrument Electronic musical instrument

1979-09-13

1981-10-27

Truhe, J. V.

Music

Instruments

84 113, 84 119, 84 126, G10H 100

Patent

active

042966639

ABSTRACT:
In an electronic musical instrument, two or more pulse signals different in phase are generated each having a frequency corresponding to the tonal pitch of an operated key, an envelope waveshape is read out upon every key operation, sampling is executed on the envelope waveshape by means of these pulse signals, and polarities of sample values are converted in reference to these pulse signals for generation of a corresponding musical tone waveshape. Minimized use of arithmetic circuits such as adders and multipliers greatly reduces production cost whilst assuring generation of a wide variety of colorful, noise-free musical tones. By addition of a slope conversion circuit, abrupt shift in the generated musical tone waveshapes can well be disappeared.

REFERENCES:
patent: 3535969 (1970-10-01), Bunger
patent: 3943456 (1976-03-01), Luce
patent: 4109208 (1978-08-01), Tomisawa et al.

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