I'm on Lion 10.7.5. My maestro + firmware are all up to date for my Duet. For the past few weeks, when I have signal going IN to the duet, there is no green input responding to my voice, only the red 'clipping' light lights up. SOMETIMES I can get signal in - I'd say about 50% of the time. Yet when it isn't working, I can't seem to get any workarounds. It's not the mic I'm using, as I switched mics around to test. Both microphones are making the red light light up (when it isn't working). Very odd. Does anyone have this problem, or faced this problem in the past?? It's a little urgent for me as I have a gig in less than a month. I perform with the duet on stage. Thanks for any help.