Keyswitch actuation detector for an electronic musical instrumen

Details Keyswitch actuation detector for an electronic musical instrumen Keyswitch actuation detector for an electronic musical instrumen

1986-03-31

1988-02-02

Witkowski, Stanley J.

Music

Instruments

84DIG2, 3403655, G10H 122

Patent

active

047222590

ABSTRACT:
A keyboard operated musical instrument is disclosed in which the number of tone generators can be less than the number of keyswitches in a keyboard array of keyswitches. A binary-tree search is programmed to search subsets of the keyswitches to find keyswitches that have been actuated. The subsets are selected in an adaptive fashion which minimizes the search time required to detect and identify all the actuated keyswitches. A modular assignment subsystem is described whereby tone generators are assigned to actuated keyswitches according to a predetermined priority logic.

REFERENCES:
patent: 3610799 (1971-10-01), Deutsch
patent: 3916387 (1975-10-01), Woodrum
patent: 4022098 (1977-05-01), Deutsch et al.
patent: 4079650 (1978-03-01), Deutsch
patent: 4086628 (1978-04-01), Woodrum
patent: 4114496 (1978-09-01), Deutsch
patent: 4495847 (1985-01-01), Deutsch et al.
A. Chaturvedi, "Tree Structures", PC Tech. Journal, Feb. 1985, pp. 78-87.

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