Electronic musical instrument by time division multiplexed tone

Details Electronic musical instrument by time division multiplexed tone Electronic musical instrument by time division multiplexed tone

1981-01-26

1983-09-06

Truhe, J. V.

Music

Instruments

84 103, 84 119, 84 124, G10H 100

Patent

active

044022425

ABSTRACT:
An electronic musical instrument comprises a plurality of key switches and a key switch scanning circuit for sequentially scanning said key switches at a predetermined speed to produce time division multiplexed key data signals representing the depressed states of respective keys. The instrument further comprises a time division multiplexed tone waveform generating circuit which generates tone signals on a time division basis and in synchronism with the scanning of said key switches, said tone signals consisting of waveform samples of all the notes, i.e. tone frequencies, that the instrument can generate, and means which delivers out the output signal from the time division multiplexed tone waveform generating circuit at the moments when said time division multiplexed key data signals arrive, thereby producing plurality of tone signals in a time division multiplexed manner.

REFERENCES:
patent: 3889951 (1975-08-01), Griffith et al.
patent: 4012982 (1977-03-01), Southard
patent: 4114497 (1978-09-01), Hiyoshi et al.
patent: 4186635 (1980-02-01), Aoki et al.

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