So, I've been hearing some annoying things in my Kemper for a while. It's a sort of phasing issue in the top end as the note decays. I've tried different guitars, different cables, different headphones, nothing helped. Then I tried my old Axe-Fx Std. Different, but similar. Tried demos of ReAxis, Spark, Logic amps, and Toneforge. Again, slight differences but all of them have this phasing, kind of bitcrushy bullshit as the note decays. Thinking it STILL might be a problem with cables or my interface, I got the bright idea to try using a software instrument instead, bypassing my interface and anything electrical in my apartment, working strictly in the box. So this is a virtual electric piano into Toneforge. Listen to the way the distortion kind of swooshes and disappears halfway along the decay of the note (at about half or 25% volume to the electric piano, it sounds a bit tucked into the background). The lower the velocity/amplitude of the note, the shorter the swoosh: https://soundcloud.com/jntzero/dist-test/s-NV5bP ^You might need headphones or decent volume to hear it, hopefully you can hear what I'm hearing. I notice that the more gain you use, the longer it takes for this swoosh to manifest itself, meaning that if you play a typical metal chug riff you're likely to not hear it. But if you play a dynamic, delicate solo with more of a crunch tone, it can sound like absolute garbage to me. So my questions are: a) What is this audio phenomenon called? I've heard of phase distortion (which is what I'd call the sound, but maybe it's something else). b) Is there ANYTHING one can do to get rid of it? Like I said, Kemper, Axe all the way down to Logic's generic Distortion plugin react the same way. c) Do ANALOG distortion pedals behave this way too, and I've just never noticed it?