Don’t know if it’s been brought up already, but there are plenty of wifi solutions that would work much better for a wireless controller situation. And many are quite cheap as well. Cubase IC and V-control pro for instance if you already have an iphone, ipad, android phone, android tablet or the like. Your going to get much better range using wifi than with bluetooth or IR. V-control pro is still pretty viable for multi touch wireless mixing with C7.5 although I do hope they end up updating it for the new mixer. Cubase IC is great if all you need is basic transport functions. Just a few suggestions if your concerned about range. Also, if your dealing with an iso booth, you may just want to drop a hotspot above the ceiling, or even snake one into the booth if reception is that bad.