Electronic keyboard-operated musical instrument

Details Electronic keyboard-operated musical instrument Electronic keyboard-operated musical instrument

1982-02-03

1983-08-30

Witkowski, Stanley J.

Music

Instruments

84 124, 84445, 84DIG26, G10H 120, G10H 510

Patent

active

044010052

ABSTRACT:
An electronic organ has a digital control circuit with a sampling circuit (3) which generates key identification signals (B) in the form of pulse series wherein the pulses denote the actuated keys (2) of the keyboard (1). Such pulses cause a tone selector or evaluating circuit (12) to transmit tone signals to a voicer circuit (15). A shift register (16, 116 or 216) is provided to delay the key identification signals so that the tone signals which the voicer circuit receives do not correspond to those normally expected on actuation of certain keys. The non-delayed key signal can be superimposed upon the delayed signal or signals (V1, V2) in a suitable summing circuit (17) to thus achieve transpositions, interval couplings and other tonal effects.

REFERENCES:
patent: 3697661 (1972-10-01), Deutsch
patent: 3816637 (1974-06-01), Whitefield
patent: 3877337 (1975-04-01), Obayashi et al.
patent: 3910149 (1975-10-01), Obayashi
patent: 3971282 (1976-07-01), Obayashi et al.
patent: 4012982 (1977-03-01), Southard
A. W. Critchley, "Multiplex Keying System for Organs", Wireless World, Jan. 1981, pp. 53-56.

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