Electronic organ percussive modulator

Details Electronic organ percussive modulator Electronic organ percussive modulator

1979-08-02

1982-02-16

Smith, Jr., David

Music

Instruments

84 119, G10H 102

Patent

active

043154522

ABSTRACT:
An electronic organ apparatus arranged to provide percussive musical tones by differentiating a rectangular waveform tone signal and subsequently clipping the differentiated signal at a variable level under the control of an envelope signal to produce an improved percussive sound envelope. The time constant of the differentiator may be varied to vary the output sound. The output sound may be controlled by concurrently varying the level of clipping of the differentiated tone signal and varying the time constant of the differentiator. Voicing filters and other modifying inputs may be utilized for further controlling the character of the output sound.

REFERENCES:
patent: 4176577 (1979-12-01), Yamada et al.
patent: 4210054 (1980-07-01), Howell et al.
Millman and Halkias, Integrated Electronics, pp. 95-97.
Lancaster, "Pitch Generators for Electronic Music," in Popular Electronics, Mar. 1974.
Lancaster, Imitating Musical Instruments with Synthesized Sound, Popular Electronics, Aug. 1975.
Lancaster, Understanding Octive Filters, Popular Electronics, Dec. 1976.

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