I always look for how the filters sounds with Res set really high. Good analog filters have a sort of fuzzy quality to them, which I suspect (not an EE here, ju

I always look for how the filters sounds with Res set really high. Good analog filters have a sort of fuzzy quality to them, which I suspect (not an EE here, just guessing) is extra harmonics from how that circuit behaves under those conditions. A lot of software emulations just sound thin, this included. I'm not an authority on the 303, though. I just like to play around with analog gear sometimes.