Abstract: Disclosed embodiments include a first playback device operating in a first mode where the first playback device plays first audio received from a second playback device via a WLAN in a groupwise fashion. After connecting to a Bluetooth audio source, the first playback device switches from operating in the first mode to operating in a second mode where the first playback device (i) ceases playing the first audio, (ii) generates second playback timing for second audio received from the Bluetooth audio source, (iii) transmits the second audio content and the second playback timing to the second playback device via Bluetooth, and (iv) plays the second audio in a groupwise fashion with the second playback device based on the second playback timing.