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.