Ex Cues is a computer program (for Mac and PC) that provides a stereo sound Playback solution for theatre and other live performance. It's simple interface gives quick visual feedback of it's current status, and is a valuable tool for complex sound operation.
Ex Cues allows audio files to be assigned to channels of a virtual mixer (with switchable 'scenes'), which can then be instantly triggered with either the keyboard, mouse, or via a programmable cue list.