I've been having this problem when I boost my amps, whenever I clean boost into the front of my amps (NewCastle 30 and AC15, heck, even a KRK Rokit 5 monitor!) I get this distorted sound that sound harsh like a digital distortion. In the video I looped from my timeline with the looper volume all the way up and you can hear it pretty pronounced. Again, it's in both amps and a monitor, so I don't think it's an amp problem (I thought it might have been one of the amps or something). Here are a few things I've chased down: 1) The sound also appears when I boost using a clean boost, both a rockaway archer (with not gain but boosted) and my bearfoot SBEQ when a bit above unity caused the sound, so it's not the timeline. 2) I don't think it's a patch cable, as in the video it's gtr-timeline-amp. So no patch cables. 3) I have 4 different instrument cables—lava, monster, and 2 mogami—I've switched all of them out and the sound is still there. 4) I thought it might be a power supply problem, but the timeline is being powered by it's own PSU not my pp2+. 5) When I plug in direct the sound isn't there, but sometimes I swear when I dig into those lower notes where the sound is prominent I can begin to hear it breaking up like that slightly. 6) I'm really at a loss at this point because I don't know what to change out or how to further assess it or what it could be. I thought when boosting a clean amp it would break up more naturally and less harsh (at least that's what I've seen in all the videos). Thanks in advance!