CHAPTER 18
CONTROL CIRCUITS
A modern high fidelity system may have many sources of program material: phono pick-up, A.M or F.M tuners, television, tape, microphone and others. Control centres are available with any degree of complexity one might desire to conveniently provide for the many kinds of inputs, to switch from one to other, apply power to several program sources, control or alter the signal, mix programs, and in general do the many operations used in advanced high fidelity techniques.
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