A method for operating a wireless audio playback device that has an electro-acoustic transducer and a microphone, wherein the wireless audio playback device is configured for playback of audio signals received from a plurality of digital audio sources and for synchronized audio playback with one or more other wireless audio playback devices. A particular predefined user action is detected. Based on the detection, wireless communication with another wireless audio playback device is enabled. Then an audio signal received by the device microphone is transmitted to and played by the other wireless audio playback device.