Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1977-06-30
1979-10-09
Rubinson, Gene Z.
Communications: electrical
Audible indication
Percussion-type sound producer
84 103, 84 101, 340365R, H03K 100
Patent
active
041707680
ABSTRACT:
A key code generator for electronic musical instruments which has a group of memories respectively corresponding to blocks of key switches and temporarily storing their closed state, a block detector for detecting the memories corresponding to the blocks that even one key switch is in its closed state, a priority selector for sequentially designating the detected blocks in the order of priority, a block designating gate means for supplying clock pulses to the memories corresponding to the designated blocks to serially derive therefrom their information in accordance with the output from the priority selector, an encoder for encoding the output from the priority selector into a binary code, a counter for counting the clock pulses outputted from the block designating gate means, means for gating the count value of the counter and the binary code designating each block with the serial output read out of each memory, means for detecting a change in the binary code, and means for resetting the counter with the output from the detecting means, and in which the binary code gated with the serial output from the memory and outputted is used as key code information.
REFERENCES:
patent: 3902397 (1975-09-01), Morez
patent: 4022098 (1977-05-01), Deutsch
Kabushiki Kaisha Kawai Gakki Seisakusho
Pojunas, Jr. Leonard W.
Rubinson Gene Z.
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