Hi there. I need an audio interface, 4 channels out, not really important how many inputs. Right now, we've got a lot of backing tracks playing along with us and we use the simplest setup. Left channel - synths, right channel - click for the drummer. The left channel goes straight to the mixing console, the right goes to a drummers small mixer. The only problem with that, is that the synth can be used only in mono. And they sound like total crap when in mono. So i'm thinking about buying some cheap, but reliable 4 channel interface exclusively for this purpose. Any suggestions?