Data reduction for a musical instrument using stored waveforms

Details Data reduction for a musical instrument using stored waveforms Data reduction for a musical instrument using stored waveforms

1986-02-10

1987-08-04

Witkowski, Stanley J.

Music

Instruments

84 123, 84 128, G10H 700

Patent

active

046837930

ABSTRACT:
A keyboard operated musical instrument is disclosed in which the musical tones are generated by reading out data values stored in a waveshape memory. The number of stored data points is reduced by storing the data values in segments corresponding to one-half of the number of data points for a period of a waveshape. By using synthesized data having a symmetry about the midpoint the second half of the waveshape is recovered by a forward and backward memory address read of each waveshape segment. After reading each segment a predetermined number of cycles, an abrupt jump is made to the next segment of waveshape data points.

REFERENCES:
patent: 3763364 (1973-10-01), Deutsch et al.
patent: 4249448 (1981-02-01), Deutsch et al.
patent: 4442745 (1984-04-01), Gross et al.
patent: 4520708 (1985-06-01), Wachi
patent: 4584921 (1986-04-01), Wachi

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