Show Cue System

I am required to have a sound spin / cycle around the theatre using speakers in the 4 corners of the room for about 15 secs. A A4 channel USB card gives outputs to two stereo amplifiers. I have 4 autostart cues which play the same sound file one after another. Panned L,R,L,R then a GoTo loop back to...

I use a Laptop with a Gigaport HD USB interface which works well. As the levels are all set in SCS I feed the Gigsport outputs straight into the power amps for each of 6 or 8 speakers. It is a bit scary as rapid shutdown in a panic would be difficult. I would prefer to have a USB based hardware mixe...