Music – Instruments – Electrical musical tone generation
Patent
1990-12-26
1993-12-07
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
84621, 84663, G10H 700, G10H 102
Patent
active
052685292
ABSTRACT:
The present invention relates to an envelope signal generator for electronic musical instruments, and more particularly to an envelope signal generator that generates natural envelopes from which digital noises are removed substantially by obtaining a difference between a current value and a targeted value and then generating a corresponding value for compensating the difference. The difference value between a pre-stored target value and a current value is obtained through an abs(A-B) generator according to sizes of a current value and a target value, and the difference value is applied to a change value data generator which generates a change value data corresponding with the difference value, an operation is performed according to the sizes of the current value and the target value so as to generate a natural envelope signal from which digital noises are eliminated, and the current value can be directly changed to the target value through an eight-bit multiplexer according to a control signal from a control circuit.
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Casella Anthony J.
Donels Jeffrey W.
Goldstar Co. Ltd.
Hespos Gerald E.
Shoop Jr. William M.
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