Is it possible to run backing tracks into HELIX, say, from a laptop or iPod's stereo source in a live setting while simultaneously using HELIX for guitar with both going to FOH? I'm at a point where I'm considering buying a small mixer, DI box, cables, etc. to make this happen, but if HELIX can do this for me while giving me a stereo backing track AND dual guitar amps out, problem solved. Plus, this would save me the cost of buying new equipment ($300 to $400) and give me a cool new rig!