Hey folks, this realm is very new territory for me so please have patience! My band has decided that we want to get our drummer on a pair of cans so he can play to a click, activate a couple samples (or just play to a backing track) and get a live mix of the band from the board. We want to avoid using a laptop onstage if at all possible. Getting a click/backing track seems relatively simple to me. We could do the poor man's route and hard pan the backing tracks into one mono channel in Reaper, hard pan the click+backing track into another mono channel and use a cheap little mixer to send the appropriate channel where it needs to go. So for this setup, we'd need an MP3 player (or similar) to play the track on, a cable to route it into a small mixer with a handful of outs, then run the backing track to FOH with a DI, correct? Now, what if we also want to get a live mix from FOH into our drummers cans? Then what would we need? I've seen a couple things on the market like the Roland SPD-SX and also Di Dock Live (which appears to be discontinued?) which all seem to be pretty cool and powerful units. However, with my limited knowledge of pro audio, I have trouble telling if hardware like this will fulfill all our needs. Any thoughts?