A method comprising: transmitting, by a control interface of an audio device to a playback device , via a first frequency channel in a first spectrum, control information identifying a second frequency channel from a second spectrum over which first audio information will be transmitted to the playback device ; selecting, by a channel selector of the audio device , the second frequency channel from the second spectrum for transmitting the first audio information to the playback device ; and transmitting by an audio interface of the audio device the first audio information to the playback device via the second frequency channel of the second spectrum; characterized by further comprising: selecting, by the channel selector , a third frequency channel in the first spectrum; when the control interface determines that the second frequency channel of the second spectrum has become unsuitable, sending, to the playback device configuration information including: a command to switch to the third frequency channel in the first spectrum; and control information identifying the third frequency channel; and after sending the configuration information to the playback device , transmitting by the audio interface of the audio device second audio information to the playback device via the third frequency channel. transmitting, by a control interface of an audio device to a playback device , via a first frequency channel in a first spectrum, control information identifying a second frequency channel from a second spectrum over which first audio information will be transmitted to the playback device ; selecting, by a channel selector of the audio device , the second frequency channel from the second spectrum for transmitting the first audio information to the playback device ; and transmitting by an audio interface of the audio device the first audio information to the playback device via the second frequency channel of the second spectrum; characterized by further comprising: selecting, by the channel selector , a third frequency channel in the first spectrum; when the control interface determines that the second frequency channel of the second spectrum has become unsuitable, sending, to the playback device configuration information including: a command to switch to the third frequency channel in the first spectrum; and control information identifying the third frequency channel; and after sending the configuration information to the playback device , transmitting by the audio interface of the audio device second audio information to the playback device via the third frequency channel. selecting, by the channel selector , a third frequency channel in the first spectrum; when the control interface determines that the second frequency channel of the second spectrum has become unsuitable, sending, to the playback device configuration information including: a command to switch to the third frequency channel in the first spectrum; and control information identifying the third frequency channel; and a command to switch to the third frequency channel in the first spectrum; and control information identifying the third frequency channel; and after sending the configuration information to the playback device , transmitting by the audio interface of the audio device second audio information to the playback device via the third frequency channel. <EOS>