Asynchronous interface for keying electronic musical instruments

Details Asynchronous interface for keying electronic musical instruments Asynchronous interface for keying electronic musical instruments

1980-01-14

1982-03-23

Witkowski, S. J.

Music

Instruments

Automatic

340365S, G08C 900, G10F 500

Patent

active

043206832

ABSTRACT:
An asynchronous interface includes two memories which store multiplexed keyboard information such that while one memory is writing in newly acquired key information from one musical instrument system at the clock rate of that system, the other memory is reading out previously acquired key information to a second musical instrument system at the clock rate of the second system. Periodically, based on timing signals derived from both systems, the read/write roles of the two memories are reversed. Any number of asynchronously clocked systems, each connected to an associated asynchronous interface, may be keyed by a single key multiplexing device or by the multiplexing information from another asynchronous interface.

REFERENCES:
patent: 3604299 (1971-09-01), Englund
patent: 3610799 (1971-10-01), Watson
patent: 3872766 (1975-03-01), Fukui
patent: 3889568 (1975-06-01), Amaya
patent: 3894463 (1975-07-01), Rocheleau
patent: 3905267 (1975-09-01), Vincent
patent: 4078465 (1978-03-01), Wheelwright
patent: 4129055 (1978-12-01), Whittington et al.
patent: 4134320 (1979-01-01), Oya

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