Music – Instruments
Patent
1977-10-27
1979-07-31
Witkowski, Stanley J.
Music
Instruments
84DIG2, 84DIG12, 84DIG22, G10H 100, G10H 500
Patent
active
041626443
ABSTRACT:
An automatic accompaniment apparatus in an electronic organ having a keyboard for melody provided with a plurality of key switches for accompaniment, respective ends of the key switches being connected to a voltage generating circuit and respective opposite ends of the key switches being connected to a chord gate circuit through memory circuits. A key selection circuit for selecting a key of music is provided so that a rhythm accompaniment tone corresponding to a melody is obtained as an output signal from the chord gate circuit. A rhythm pulse is generated from a rhythm pulse generator. Connected between the key switches and the voltage generating circuit is a switch element and a keying pulse generator connected to the switch element. A delay circuit is connected to the output of the keying pulse generator and an inverter is connected to the delay circuit and to the switch element such that the inverter is activated by a first pulse in one bar of the rhythm pulse generator to generate a signal for bringing the switch element into on position whereas the switch element is brought into off position by a signal generated by a delay pulse from the delay circuit.
REFERENCES:
patent: 3986424 (1976-10-01), Sakashita
Kabushiki Kaisha Kawai Gakki Seisakusho
Witkowski Stanley J.
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