Music – Instruments
Patent
1983-01-17
1985-05-07
Isen, Forester W.
Music
Instruments
84 128, 84DIG12, G10F 100
Patent
active
045150575
ABSTRACT:
An electronic musical instrument having a keyboard has a sound wave-shape generating circuit comprised of a pitch ROM connected to the keyboard. A first selector is connected to the keyboard, and a second selector is connected to the pitch ROM. A drum rhythm sound pitch data generating circuit and a pitch forming circuit are each connected to the first and second selectors. A wave-shape memory and a noise rhythm sound forming circuit are each connected to the pitch forming circuit. A third selector is connected to the wave-shape memory and the noise rhythm sound forming circuit. An envelope counter is connected to the third selector and the output of the envelope counter is fed to an audio amplifier. In use, a play/rhythm switching signal is selectively applied to the first, second and third selectors so that both a drum rhythm sound and a noise rhythm sound can be generated using only the one wave-shape memory.
REFERENCES:
patent: 4305319 (1981-12-01), Linn
Momoshima Yukichi
Nagasaka Nobuyuki
Adams Bruce L.
Burns Robert E.
Isen Forester W.
Kabushiki Kaisha Daini Seikosha
Lobato Emmanuel J.
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