I was poking around in the girl next door electro house soundset off the virus website yesterday and I noticed that when I use the second patch in the set titled "DIRTY2" after I hit a note I get a very high pitched squeal (sounds like a very high pitch sin wave) that keeps going until I switch patches and play a few notes on a new patch. Sometimes if I keep hitting notes using the DIRTY2 patch it keeps making the squeal but the sound also loses all of it's character. After about 3 hits it just sounds like a burst of distorted noise (and not in the good sense). I can't reliably reproduce the degrading note quality, but the squeal happens every time so here's an mp3 of what I'm talking about
:
http://www.creattivox.com/badviruspatch.mp3