Fill note generation system for microcomputer controlled organ

Details Fill note generation system for microcomputer controlled organ Fill note generation system for microcomputer controlled organ

1981-06-22

1984-02-07

Isen, F. W.

Music

Instruments

84 103, 84 124, G10H 306

Patent

active

044296045

ABSTRACT:
An electronic keyboard musical instrument comprising a multiplexed keyboard and a programmable microcomputer interfaced between the keyboard and a system of capture tone generators. The loading circuitry for the microcomputer, which is interposed between it and the keyboard multiplexer output, monitors the serial data stream and transmits only key change information to the microcomputer. The microcomputer controls the assignment and deassignment of tone generators for the accompaniment, solo and pedal manuals based on the key change information transmitted to it. Fill note information is taken from the captured accompaniment keyers and compared with the series of binary words for the current scan of the manuals in order to produce a keydown pulse when there is identity of pitch between the captured accompaniment tone generators and the scanning of the solo manual. These keydown pulses are added to the main multiplexed data stream through a window gating circuit that is opened only during a portion of the octave immediately following the scanning of the highest note of the solo manual.

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