On Sunday 17 July 2005 23:46, Atte Andr? Jensen wrote: > I think I found out more. It only happens if the valve saturation plugin > is left without input for some time. I can trigger it *every* time and > make it go away *every* time. That is diagnostic of a denormal problem, probably a IIR filter that doesn't handle the tail of the decay properly. This effect tends to show up very badly on PIV type chips. It is a bug, but is a fairly easy fix. Regards, Dan.