Audio system with bi-directional signal transfer between audio transmitters and receivers to permit checking of signal quality and changing of selected channel

摘要

An audio system comprises at least an audio transmitter (A) and at least an audio receiver. Receiver and transmitter have means for bi-directional signal transfer via electromagnetic waves or over a power supply network. Transmitter and or receiver have means for signaling the receipt of a signal and at least transmitter and or receiver has means for adjusting a signal or changing a channel. Independent claims are also included for the following:- (a) a method for audio data transfer and checking between at least a transmitter and a receiver; and (b) a circuit arrangement for audio data transfer and checking.