It's weird though... it's not like a self-oscillating feedback when I say 'overload', it just stops playing any delay at all until you turn them down. And I have some patches (all written from basic program) where this has happened, and then I'll try it again later and it doesn't seem to happen. It might have to do with the amp envelope, but it really doesn't seem like it. I'll play around some more and try to narrow it down.