Rex
Dignified but Approachable
100% correct. Input levels don't affect internal signal level except at extreme settings.I'm still a newb on this thing, but I'm pretty sure the input trim on the I/O shouldn't have anything to do with it. If I understand right, turning it down would actually increase your signal to noise ratio, though probably not noticeably. If it were too high, you could get input clipping, but not the "grit" that the OP is concerned with. I could be totally wrong about this, so feel free to correct me if I'm totally misunderstanding it. I've only had mine for a couple months.