Analog-to-digital interface circuit for electronic musical equip

Details Analog-to-digital interface circuit for electronic musical equip Analog-to-digital interface circuit for electronic musical equip

1985-01-17

1986-07-29

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, 84 101, H03M 100

Patent

active

046033211

ABSTRACT:
An interface circuit for converting analog signals from a musical instrument and/or a microphone to digital pulse signals for use with electronic music synthesizers and the like includes an input amplifier for receiving analog signals from a musical instrument and/or a microphone. A precision rectifier is coupled to the input amplifier for generating full-wave rectified analog signals. A strictly digital output circuit is connected to the rectifier for generating a strictly digital pulse signal. A quasi-digital output circuit is connected to the rectifier for generating a quasi-digital pulse signal in synchronism with the strictly digital pulse signal. The digital pulse signal from the digital output circuit and the quasi-digital pulse signal from the quasi-digital output circuit are adapted to drive a music synthesizer.

REFERENCES:
patent: 3815124 (1974-06-01), Brewer
patent: 4091379 (1978-05-01), Wu et al.
patent: 4193332 (1980-03-01), Richardson
patent: 4296407 (1981-10-01), Minakuchi
patent: 4300431 (1981-11-01), De Rocco
patent: 4316401 (1982-02-01), Travel et al.
Bernie Hutchins, "An Experimental Pitch Extractor and Envelope Follower," Musical Engineer's Handbook, 1975, pp. 3-4.

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