Tone data compressing and expanding system for digital electroni

Details Tone data compressing and expanding system for digital electroni Tone data compressing and expanding system for digital electroni

1981-12-18

1983-11-15

Witkowski, Stanley J.

Music

Instruments

84 126, 84 127, 381 31, G10H 1057, G10H 106, G10H 146

Patent

active

044148780

ABSTRACT:
A tone signal having been data compressed or expanded is obtained through a circuit for taking the sum of upper three bits of envelope data, a latch for storing the output of said circuit, a circuit for setting the extent of bit shift of digital tone data according to the output of said latch, a latch group for latching the tone data having been bit shifted according to the output of the setting circuit, and an amplifier, the amplification level of which is set according to the extent of bit shift and which receives and amplifies the bit shifted tone data from a digital-to-analog converter.

REFERENCES:
patent: 4282790 (1981-08-01), Wachi

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