Music – Instruments
Patent
1980-05-30
1981-09-08
Witkowski, S. J.
Music
Instruments
84 101, 84 117, 84 119, 84 124, G10H 700
Patent
active
RE0307360
ABSTRACT:
In an electronic musical instrument, the keys of a keyboard are divided into a plurality of groups by octaves, and a wave generator is provided with a memory for storing constants corresponding to musical tone frequencies to be generated according to the notes includes in a desired group out of the plurality of group, an accumulator for repeatedly adding the constants read out of the memory, and a bit position shifting circuit for shifting the bit position of the data produced by the accumulator according to the octave range of a note to be produced, thereby to obtain the data varying repeatedly according to the frequency of a note to be produced, and to reduce the storing capacity of the memory when compared to the number of keys.
REFERENCES:
patent: 3610800 (1971-10-01), Deutsch
patent: 3697661 (1972-10-01), Deutsch
patent: 3910150 (1975-10-01), Deutsch et al.
patent: 3929051 (1975-12-01), Moore
patent: 4011784 (1977-03-01), Fukui
patent: 4046047 (1977-09-01), Roberts
patent: 4052924 (1977-10-01), Deutsch et al.
patent: 4080862 (1978-03-01), Hiyoshi et al.
patent: 4114497 (1978-09-01), Hiyoshi et al.
Aoki Eiichiro
Hiyoshi Teruo
Nakada Akira
Okumura Takatoshi
Suzuki Tsutomu
Nippon Gakki Seizo Kabushiki Kaisha
Witkowski S. J.
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