Musical tone producing device of waveform memory readout type

Details Musical tone producing device of waveform memory readout type Musical tone producing device of waveform memory readout type

1984-06-15

1987-02-10

Shoop, Jr., William M.

Music

Instruments

84 123, 84DIG9, 84 101, 84 119, G10H 106

Patent

active

046415645

ABSTRACT:
A musical tone producing device of a waveform readout type has a reference waveform memory and a difference waveform memory.
The reference waveform memory stores a reference waveform which is similar commonly to each of divided waveforms belonging to a plurality of blocks into which a musical tone waveform of a musical tone to be produced is divided.
The difference waveform memory stores difference waveforms, each of which is a difference between the reference waveform and each of divided waveforms.
The reproduction of the musical tone waveform is accomplished by reading out the reference waveform and the difference waveforms successively and by successively adding the read out reference waveform and the difference waveforms. This musical tone waveform synthesis according to utilization of difference waveforms contributes to the reduction of memory size.

REFERENCES:
patent: 4281574 (1981-08-01), Deutsch
patent: 4352312 (1982-10-01), Whitefield et al.
patent: 4437379 (1984-03-01), Okumura et al.

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