Embodiments described herein provide for detecting movement in proximity to a playback device and responsively modifying the audio that is output from one or more playback devices. According to an embodiment, a user is able to wave his or her hand over a playback device to modify the audio that is output from the playback device, one or more different playback devices, or all of the playback devices. The embodiments are particularly useful as a snooze feature, in which an alarm from a playback device (or group of playback devices) is snoozed for a time when triggered by the user's movement.