A peripheral audio system that is used to monitor or manipulate other signals from an audio source or lighting device is described which includes a detector device adapted to receive audio inputs from the audio sources. The peripheral audio system includes a processor adapted to monitor or manipulate...http://www.google.co.uk/patents/US6175632?utm_source=gb-gplus-sharePatent US6175632 - Universal beat synchronization of audio and lighting sources with interactive visual cueing
