Hi, David G. Dixon wrote: > >> Try putting the limiting in the LP path. > > Please don't... Could you expand on the "don't" part? Works for me, giving near- constant amplitude in self-oscillation from 4Hz to about 16kHz: http://www.milton.arachsys.com/nj71/pdf/cesyg/vcf-sch.pdf Cheers, Neil -- http://www.njohnson.co.uk