Apparatus for integrating a plurality of audio systems

Abstract

An apparatus for integrating a plurality of audio systems, for enabling a selected one of a plurality of audio inputs to be transmitted as an audio output. It is adapted to integrate, for example, a stereo sound system and a telephone sound system, so as to be operable from a control panel adapted to be mounted in the wall of a bathtub or the like. The apparatus is adapted to enable elements of the integrated system to be shared in common by a plurality of audio inputs, so as to generate a selected audio output. The apparatus includes a voltage-controlled amplifier, for controlling the selected audio input signal with a direct-current control voltage. It further includes a plurality of parallel circuits, for generating the direct-current control voltage, one such circuit for each of the plurality of audio inputs, and elements for switching from one such circuit to another. Each such parallel control voltage generating circuit, and the associated audio input signal, are switchable by the switching elements into and out of connection with the voltage-controlled amplifier, in response to the control input signal associated with the selected audio input signal.