Apparatus for combining phonograph signal with auxiliary audio s

Details Apparatus for combining phonograph signal with auxiliary audio s Apparatus for combining phonograph signal with auxiliary audio s

1978-02-06

1980-11-04

Morrison, Malcolm A.

179 1G, H04R 500

Patent

active

042321905

ABSTRACT:
The output signals of a phonograph and of an auxiliary audio signal source, such as a high impedance microphone, electric guitar, or the like, are combined before being fed to the amplifier of the phonograph, whereby the combined signals are amplified without distortion, and are fed to one or more speakers, thus audibly reproducing the phonograph recording with the auxiliary sound signal superimposed thereover. The device which combines the signals includes means for suppressing the base frequencies in the auxiliary signal, and for selectively adjusting the amplitudes of the two signal components.

REFERENCES:
patent: 3830978 (1974-08-01), Odagi
patent: 3941931 (1976-03-01), Osakabe
N. Crowhurst, "High Fidelity Sound Engineering", Newnes Ltd., 1961, pp. 222-229.
H. Tremaine, Audio Cyclopedia, H. Sams Co., 1969, pp. 419, 425.

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