Seamless transition of source of media content

In one aspect, a playback device is configured to (i) receive a first stream of audio data representing audio content from a computing system, (ii) detect an indication that a source of the audio content is to switch from the computing system to a user device; (iii) after detecting the indication, establish a point-to-point wireless link with the user device over which to receive a second stream of audio data; (iv) receive the second stream of audio data representing the audio content; (v) determine a future time at which to transition from playing back the audio content using the first stream of audio data to playing back the audio content using the second stream of audio data; and (vi) at the future time, transition from playing back the audio content using the first stream of audio data to playing back the audio content using the second stream of audio data.