Question I am asked is to playback some mono and stereo material during a dance performance using a surround sytem as well as main PA for playback...Now usually I would delay the different surround speaker sets to time align them with the PA and then using reverb or some effect on the surround tracks to make them slighly different from the more powerful FOH PA, I've also use a differencial signal from the stereo tracks . .but I would like to try something different ...any suggestions?

Thanks

Ray