Automatic musical tuning device

Details Automatic musical tuning device Automatic musical tuning device

1980-02-01

1981-06-09

Hix, L. T.

Music

Accessories

Tuning devices

84DIG18, 324 78D, 324 78Z, 324 8L, G10G 702

Patent

active

042717469

ABSTRACT:
An electronic automatic musical tuning device whereby an incoming tone from a musical instrument is picked up by a microphone, amplified and transformed to a square wave signal and compared in a phase locked loop with a progressive series of standard frequencies until matching occurs and the loop is locked to enable a display of the tone in a convenient output such as a row of lights.

REFERENCES:
patent: 3564441 (1971-02-01), Eide
patent: 4120229 (1978-10-01), Ota
patent: 4122751 (1978-10-01), Caluin
patent: 4207791 (1980-06-01), Murakami

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