Music – Instruments
Patent
1975-09-09
1976-11-16
Jackmon, E. S.
Music
Instruments
84 101, 84 117, G10H 102, G10H 106
Patent
active
039916464
ABSTRACT:
An arpeggio circuit for an electronic keyboard instrument has means for generating a desired sweep voltage which is continuously varied, a voltage control type oscillator connected to the generator for generating a sweep frequency which is varying in proportion to the sweep voltage, a plurality of pulse generating means, one for each note of the keyboard instrument, and each having a series connected resonance circuit means and pulse forming means for forming a pulse in response to the output from said resonance circuit means. The pulse generating means are connected to the oscillator in parallel with each other. Tone generator means is coupled to the outputs of the respective pulse generating means for generating tone signals in response to the outputs of the pulse generating means, and arpeggio producing means is coupled to the pulse generating means for cancelling the output of the resonance circuit means for all of the pulse generating means other than the pulse generating means corresponding to the notes of the arpeggio.
REFERENCES:
patent: 3639853 (1972-02-01), Sakai
patent: 3694559 (1972-09-01), Suzuki
patent: 3725562 (1973-04-01), Munch et al.
patent: 3776087 (1973-12-01), Ogi
patent: 3854366 (1974-12-01), Deutsch
Jackmon E. S.
Roland Corporation
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