Music – Instruments
Patent
1980-01-09
1981-07-21
Truhe, J. V.
Music
Instruments
84 124, G10F 100
Patent
active
042791871
ABSTRACT:
An arpeggio system, utilizing bipolar digital logic devices in all control and sequencing functions, generates a variety of arpeggio and strum note patterns. A key operated switch enables a NOR logic note gate, or a series of octavely related note gates, and activates a system clock which causes a pulse to be transmitted along a chain of shift registers, one of which corresponds to each note of the organ. If a given note gate has been enabled when its corresponding shift register is pulsed, the note gate is triggered. When a note gate is triggered, the system clock pauses for a preselected interval allowing the signal from a corresponding tone generator to be sounded through an appropriate system of filters and amplifiers. The system clock can cause the shift registers to scan in the up, down, or up and then down directions. An octave priming device can permit the sounding of notes in higher octaves which correspond to notes actually played.
REFERENCES:
patent: 4144788 (1979-03-01), Bione et al.
patent: 4160399 (1979-07-01), Deutsch
patent: 4185530 (1980-01-01), Robinson et al.
patent: 4187756 (1980-02-01), Robinson et al.
patent: 4192212 (1980-03-01), Yamaga et al.
patent: 4202236 (1980-05-01), Wilcox et al.
Baldwin Piano & Organ Company
Isen Forester W.
Truhe J. V.
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