Up to now, I've been communicating with the tracking room via the PHONES socket on my Behringer Eurorack MX2642A However, I'm aware that some (most?) people cue using the aux sends. But the aux sends on my desk are mono i.e. when I plug my headphones into one of the aux sends, it only comes through in one ear. Whereas the PHONES socket is stereo. Am I to take it that when creating a cue mix using aux sends, you need a seperate mixer in the tracking room in order to be able to have a stereo mix? What if you had two musicians each needing a headphone mix but one wanted, say, more guitar/less vox and the other more bass/less guitar?