发明名称 |
Electronic musical instrument |
摘要 |
An electronic musical instrument includes twelve multiplexed wave data generators each of which corresponds to one of twelve musical notes in an octave and produces a multiplexed wave data signal which has a basic pulse frequency decisive of a note and has data indicating states of octavely related plural waves for the same note in a time-division-multiplexed manner. A note selection circuit selects a multiplexed wave data signal for the note designated by the depressed key. The selected wave data signal is converted by a shift register to parallel wave data signals, which are latched by a latch circuit. Selection of the octave is made by the latching time of the latch circuit determining the positions of the bits in the shift register to be latched. Rewriting of latched data in the latch circuit is effected each time the value of the data signal having the highest frequency among the wave data signals varies. The outputs of the latch circuit are used as address signals for reading musical tone waveforms from a waveform memory.
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申请公布号 |
US4302999(A) |
申请公布日期 |
1981.12.01 |
申请号 |
US19800161222 |
申请日期 |
1980.06.20 |
申请人 |
NIPPON GAKKI SEIZO KABUSHIKI KAISHA |
发明人 |
OKUMURA, TAKATOSHI |
分类号 |
G10H7/02;G10H1/18;G10H7/04;(IPC1-7):G10H5/00;G10H7/00 |
主分类号 |
G10H7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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