This comprises a TiMax Audio Imaging delay matrix driven by a Track The Actors (TTA) system, comprising a TTA Cordis Radio Eye mounted above stage which receives signals from radio tags (pictured below) worn by each actor which are fed via Ethernet to the TTA software, which analyses them to derive positional information about the actors. The TTA software sends MIDI messages to the TiMax software which sets level/delay in the TiMax matrix to place the actors' audio images in the appropriate localisation zones on stage - automatically and in real time.