If your Output LED turns red, the "digital fizz" is clipping and can be fixed by turning down the master volume or - for individual overloud profiles - the volume knob.
Thanks for the heads up. I don't have this particular profile, but have experienced it with a few others. I thought it was my monitors at first, but playing prerecorded tracks through them were fine.
The problem for me is I'm colorblind where red/green is concerned. I don't know when I'm clipping because the red LED looks pretty much the same as the green to me. (Cue sad violin music...)
Maybe at some future date Chris Kemper can have an option of changing the default LED colors. In the meantime, I'll tweak the Master and profile volumes and see if that fixes it. In another thread along these lines, Guitarnet70 suggests checking the volume setting in some effects and the cabs, too.
Would the Clean Sense/Distortion Sense have anything to do with this as well?
7% of Fully Grown Male Individuals are colorblind, by the way.