Hey guys, today I plugged my SM58 into Input 1 on the FireFace, set the volume in TotalMix and opened Logic. As soon as I hit the 'R' button (just to hear it back via Logic, not actually recording) I get tonnes of crackling. Before, when I was just listening to the sound in TotalMix, I had no problem: it started crackling as soon as I hit Logic's 'R' button. I switched mics to see if the mic was the problem, but I had the same problem with another mic. It is not the XLR because like I said, when just singing in TotalMix to adjust and set gain levels, I have no problem at all. My CPU and RAM are fine, barely being driven at all, so it is not this. I tried Input 2 on the interface but had the same problem.

I've had this problem once before, and I just restarted the iMac and it went away. But this did not work this time. Anyone have any ideas what is going on? Oh yeah, and I did try actually recording audio, and all the crackling was present. The buffer-size is fine, I have recorded with the exact same set up and settings for the past 3 months with no problems. So yeah, I dunno what to do.