Apparatus for generating tones by use of a waveform memory

Details Apparatus for generating tones by use of a waveform memory Apparatus for generating tones by use of a waveform memory

1987-08-31

1989-03-07

Witkowski, Stanley J.

Music

Instruments

84 128, 381 51, 364419, 364718, G10H 700

Patent

active

048095770

ABSTRACT:
A tone generating apparatus comprises at least an address generator, a waveform memory and a sound system. The waveform memory provides a plurality of storing areas each of which stores word data of N bits. Amplitude data of M bits (where M denotes as N<M.ltoreq.1.5N) of two sampling points are pre-stored in these storing areas in order to raise the utility efficiency of the waveform memory. Then, the word data stored in each storing area are sequentially read out from the waveform memory in a predetermined order based on the addresses generated by the address generator, and the amplitude data of two sampling points are reproduced by use of three word data stored in three storing areas. As a result, the tone corresponding to the reproduced amplitude data is generated in the sound system.

REFERENCES:
patent: 4622877 (1986-11-01), Strong
patent: 4641564 (1987-02-01), Okamoto

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