Does anyone here have any tips on the best way to connect a Digitech VocalistLive 4 (VL4) harmonizer for studio use? I realize it's made for live performances, but suspect it used sparingly, it could add a little harmony goodness to some vocals. I've used it live and it's a big plus in that setting. When I've tried to route it through my Alesis IO2 interface, it just doesn;t work. In fact, I hope I didn't ruin my interface with a signal that's too hot. Thanks!