Music – Instruments
Patent
1980-03-24
1982-06-08
Witkowski, Stanley J.
Music
Instruments
84DIG11, 328 14, 328 15, 328 16, 328 18, 328 61, 331 51, G10H 506
Patent
active
043333745
ABSTRACT:
A digital oscillator generates a basic pulse having a period which is a predetermined large number of times of a clock pulse period. During the basic pulse period are allotted a predetermined small number of time slots defining submultiple frequency channels. There is provided a shift register having the channel number of stages, each stage being assigned to each channel. The contents of the respective stages are changed at respectively different periods which are multiples of the basic pulse period. The contents are taken out timewise-serially, one at a time, stage by stage, and superimposed on the basic pulse to constitute a time-division-multiplexed wave data signal. The delivered signal is demultiplexed to form individual waves having respectively different frequencies which are submultiple-related to the frequency of the basic pulse. This generator is very suitable for electronic musical instruments, as a single line transmits plural wave data.
REFERENCES:
patent: 4046047 (1977-09-01), Roberts
patent: 4282785 (1981-08-01), Obayashi et al.
Aoki Eiichiro
Nakada Akira
Okumura Takatoshi
Oya Akiyoshi
Uchiyama Yasuji
Nippon Gakki Seizo Kabushiki Kaisha
Witkowski Stanley J.
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