Music – Instruments – Wind
Patent
1976-12-06
1978-06-06
Jackmon, Edith S.
Music
Instruments
Wind
84337, 84341, G10B 310
Patent
active
040928950
ABSTRACT:
A solid state electronic relay system for a pipe organ having at least one input register connected to one or more organ manuals, respectively, to receive parallel input signals therefrom, and respectively convert same into a time based serial digital signal wherein each note of the keyboard occupies a particular interval of time in the digital signal. The serialized signal of an input register propagates through a digital delay line at a predetermined clock frequency. Selected ones of the delayed digital signals provided thereby are tapped to derive octave and mutation pitch signals. Accessory circuits receive the serialized digital signals and using combinational and sequential digital techniques modify the digital signals to provide reiteration, pizzicato, sostenuto and the like effects. The tapped signals and modified signals are selectively combined with logical gates under the control of the organ "stops" to provide the unification and accessory functions. The combined digital signals are routed to control specified organ pipes through a plurality of rank drivers which receive the serialized signals and produce a plurality of periodically updated parallel signals therefrom to effect sound reproduction in response to the signals generated by the organ manuals, stop keys, and accessory circuits.
REFERENCES:
patent: 3160051 (1964-12-01), Guenther
patent: 3501990 (1970-03-01), Jappe et al.
Jackmon Edith S.
Welch Ronald D.
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