My helix sounds strange. I had it to a point where it was sounding great and just the other day it started sounded harsh and unnatural almost like the amp tone was sort of digitally clipping an interface (but it is not). I had lots of great presets that sounded wonderful and now they sound off and not good. It sounds pretty bad in all cases. I have made sure the impulse is working tried many different IRs and cabs. Checked all the global settings and the global EQ is bypassed. I have tried it through all the the inputs and several outputs through different sources. Can't figure it out. Would love some help. Thanks!