Chris Stelloh have been playing around with Jürgen Haible Wasp CV Filter and sent me two verified layouts..
In hi sown words:
I had a chance to build up that LM13700 version of the Wasp Filter and
found that using a much different value of potentiometer for the cutoff
control made for a better filter sweep.
This one is also verified. It contains a level pot that cuts or boosts
the CV level. The oscillation switch implements the modifications that
people have come up with for the Doepfer A-124 – which is a module that
is basically a wasp. Albeit with some minor part value changes, as well
as a HEAVILY modified CV and frequency/cutoff section.
