I just got the emu 1212m and I'm having problems recording vocals. I have a Shure sm58 going through a Focusrite trakmaster and a Lexicon mpx110...I'm recording in adobe audition. I can hear myself clear in the headphones but when I record certain parts of my verse won't come out. .in other words, when I look at the recorded vocal wave it's thick and certain parts just cut out so it's flat (no sound) then it comes back in. I've been trying to fix this for a few hours and have tried everything I can think of, reducing the gain on the preamp, mic placement. .any help ya'll could give I'd appreciate