Polyphonic electronic musical instrument performing D/A conversi

Details Polyphonic electronic musical instrument performing D/A conversi Polyphonic electronic musical instrument performing D/A conversi

1984-04-17

1986-12-30

Witkowski, S. J.

Music

Instruments

340365S, G10H 118

Patent

active

046320016

ABSTRACT:
A tone generation circuit can generate digital tone signals in a plurality of channels on a time shared basis and these digital tone signals are supplied to a digital-to-analog converter provided commonly for the respective channels. The digital-to-analog converter converts the digital tone signals of the respective channels into analog signals individually for each of the channels in the time division multiplexed state. Analog memory circuits are provided for the respective channels for demultiplexing and individually holding the time division multiplexed analog tone signals supplied from the digital-to-analog converter. The analog tone signals held in the respective analog memory circuits are individually read out in synchronism with pitches of notes assigned to the respective channels. An analog adder is provided, when required, for summing up the read out analog tone signals of the respective channels.

REFERENCES:
patent: 3639913 (1972-02-01), Watson
patent: 4134320 (1979-01-01), Oya
patent: 4134321 (1979-01-01), Woron
patent: 4409876 (1983-10-01), Katoh
patent: 4539883 (1985-09-01), Chihana

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