One of the guys at Schneider's Buro in Berlin showed me this particular
"feature" on a few Doepfer modules a while back, in particular the VCAs.
I believe it has something to do with buffered vs unbuffered inputs, in
which case the problem is definitely in the module. If this is the
cause, perhaps you could rig up a simple voltage follower with a single
opamp to buffer the VCA inputs

http://hyperphysics.phy-astr.gsu.edu/Hbase/electronic/opampvar2.html

(I figure, if people want to make electronic music, they should learn
something about what it's made from: electricity!)

best!
D.

argitoth wrote:

> mirror_saw7778, you're not alone, take a look at this thread. I even
> have an audio demo. Let me know if you are hearing the same problem in
> my audio demo: http://modularsynth.net/viewtopic.php t=2214&start=0
>
> Monroe, the thump problem lies within the modules. Some modules thump,
> others don't. My RS-110 filter thumps with instant attacks, but not my
> A-106-1 Xtreme Filter. My Model 12 filter thumps in Low Q mode, but
> not in High Q mode. Combining the A-132-3 with a filter to create
> something like a lowpass gate can solve the thump problem.
>
> mirror_saw7778's Asol SY02 does not thump. His A-132-3 does.
> mirror_saw778, CAN YOU PROVIDE AN AUDIO DEMO FOR BOTH MODULES

--
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 152:
"Tape your mouth"