I understand and agree there are more underlying variables and items that need to be taken into consideration. I was just thinking if all you need to do on the fx board is gnd 1 of 2 pins to make the vol go up or down that it may be possible to have the mini do it. (or simulate it) the triggers are the same way just monetarily grn a pin and it plays that track.
another one that has caused grief is the PIR output signal can be from seconds to minutes. like I said just checking to see the possibilities and appreciate any input. it seems most everyone has a "specialty" that they know a lot about and maybe I will run across an audio output fanatic that controls sound boards through serial port. never know.
once I find out if all the things "can be" accomplished I will more than likely just hire someone to put it together.
thanks again.