Hi Pierre

> I know the 'which filter' question gets asked a lot but here goes
> anyway. I am looking for a low pass filter that is quick and hard. I
> want to be able to create those minimoog style thumping basslines -
> y'know the type: single osc into a filter that opens and closes very
> quickly and imparts a marked percussive quality to the bass. Not a
> blip or zap, mind you, more like a knock: the sound still has plenty
> of body and warmth and is clear and well defined. My guess is that
> the 108 or 105 are two likely candidates (I can only just fit a 108 so
> getting both is, for the moment, out of the question), but any further
> input would be much appreciated.

The A-105 is very nice for that to. I have no experience with the A-108, but I assume, that is very nice for this kind of sounds, as the A-120 is, if you overload it a littlebit.

For the "> Not a blip or zap, mind you, more like a knock" I recommend to hardsync the oscillator by the Gate(!). Also I recommed to use the same envelope for the VCA as for the VCF (or should I say, I recommend to build a copy of the MS-404 ;-) )

Florian