Key signature actuator for a musical keyboard

Details Key signature actuator for a musical keyboard Key signature actuator for a musical keyboard

1988-12-08

1990-02-27

Witkowski, Stanley J.

Music

Instruments

General features

84453, G10G 700

Patent

active

049035711

ABSTRACT:
When a musical keyboard is being played, "Note On" messages, each accompanied by one or more digital identifying numbers, are transmitted to a separate sound generator. A key signature actuator intercepts these transmissions and changes the numbers electronically so that the sharps or flats in a selected key signature will be automatically actuated. The messages accompanied by the changed numbers are sent on to the sound generator, where the proper sharps or flats are automatically sounded when front digitals of the keyboard are played. A uniform pitch changing parameter can also be selected. This parameter can be added to the pitch numbers before transmission to the sound generator so as to change the overall pitch of its musical output.

REFERENCES:
patent: 2484930 (1949-10-01), Cornelius
patent: 3890871 (1975-06-01), Oberheim
patent: 4198890 (1980-04-01), Massey et al.
patent: 4777857 (1988-10-01), Stewart
Droman, David, Exploring MIDI, ComProducts, Huntington Beach, 1984, pp. 1-35.
MIDI 1.0 Detailed Specification, International MIDI Association, North Hollywood, 1985, pp. 1-30.

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