Microphone mixer with predistortion indication

Details Microphone mixer with predistortion indication Microphone mixer with predistortion indication

1978-10-10

1981-05-26

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

G11B 2736

Patent

active

042701511

ABSTRACT:
A new circuit for giving audible indication to an operator of sound recording equipment impending distortion of audio-signals. The circuit includes a predistortion circuit which introduces distortion into a monitor circuit at a predetermined level below saturation and distortion of the primary channel thus allowing the operator to adjust the gain in the primary channel to avoid distortion on the channel as finally recorded. The invention employs a clipping circuit and amplifier in a branch channel from the principal signal channel. The branch channel including its distortion circuitry is set at a predetermined level with respect to the distortion in the primary channel. A visual indication of distortion is also available in the form of an L.E.D. display.

REFERENCES:
patent: 2341706 (1944-02-01), Fields
patent: 3031525 (1962-04-01), Oniki
patent: 3659060 (1972-04-01), Wolft et al.
patent: 3879751 (1975-04-01), Gimelli
patent: 4092678 (1978-05-01), Nishikawa

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