I'm looking for a floor unit that does nothing but play back pre-recorded sounds. Something that I can program songs into. For example... I have a song that has three sound tracks in it. Not music, various other sounds (wind blowing, sirens, etc...). I'd like to be able to select this song and then select the sound I want to play. Get it? Anybody ever seen anything like this? There has to be something out there that does this.