Method of identifying a wireless communication channel in a sound system

An audio receiving device for wirelessly receiving audio communication from a wireless broadcaster over an unknown radio channel among a predefined number of possible radio channels, the audio receiving device comprising:

• a microphone for picking up an audio input signal or an audio signal derived from the audio input signal in the environment of the audio receiving device, the microphone converting the picked up signal to an electrical microphone output signal;
• a channel selection unit configured to select a radio channel as a candidate of the unknown radio channel in a wireless receiver of the audio listening device among said predefined number of possible radio channels;
• the wireless receiver configured to receive an electric signal on the channel selected by the channel selection unit among the predefined number of possible radio channels;
• and
• an analyzing unit configured to analyze the electric signal received by the wireless receiver and the electrical microphone output signal from the microphone of the audio receiving device, and configured to determine whether a predefined criterion of a degree of similarity of the two signals is fulfilled, wherein
• the channel selection unit is configured to keep the selected radio channel as the receiving channel, if the predefined criterion is fulfilled, and configured to select another channel from among said predefined number of possible radio channels as the candidate of the unknown radio channel, if the predefined criterion is not fulfilled.