In a living room at 456 Des Voeux Road, Miriam puts on her head a Sony ECM-MS907 stereo mic which is connected to a Sony MZ-R30 portable MD. A prerecorded music backing is playing on a consumer hi-fi nearby. With a push of the record button, the minidisc records everything the microphone picks up:- Miriam's voice, the ambience of the room while she's doing housekeeping as well as the music playing on the speakers ...