A control system for selectively operating a sound system provided in a walk-around character costume. e.g., to play audio files in an order defined by a dialog tree that can be navigated by a performer wearing the costume. The control system includes a trigger mechanism provided in the costume operable by a performer wearing the costume to generate and transmit at least one trigger signal to navigate through a dialog tree. A controller receives the trigger signal and transmits a control signal causing the sound system to playback pre-recorded dialog. The system includes a trigger processing module run by the controller for processing the trigger signal and, in response to such processing, for navigating pre-recorded audio for a show to select the set of pre-recorded dialog. The trigger mechanism includes a first and a second pressure sensor in a thumb and index finger of a glove of the costume.