Doepfer

Subject:  Re: Is there something wrong with my VCA?

Hi Ethan

Yes, I have noticed this also. This was right from the
beginning when I bought my new rows basic system 2 (sorry,
earlier I said wrongly mini-system). When I opened the
filter right to Q, there was an abrupt transition. I never
liked that and wondered, but thought, that it was normal
for any filter. Learning more bout filters, I know 
no that it's typical for this Doepfer filter and
it's certainly not normal for other filters. 
A really great filter for example I have in my Moog
prodigy. This filter doesn't distort and goes smoothly into
self oscillation. It never loses it's beauty and when
you decrease the cut off, you can evoke marvelous space effects!
Yes, the A-121 has the same fault. 
The second best filter which I have so far is the A-122. This is
a superb filter which goes into self oscillation smoothly and
never sounds shrill just before that point. Decreasing the
cutt off again can result in great effects. 
Even better is the A-123, this one tracks constantly the whole
way. Using Q and decreasing the cut off again gives way to
all sorts of interesting nasal sounds which beg to be treaded 
even more!

Roel

Ethan wrote:

That's odd, I was just going to email 
hardware@d... and ask the same thing
about my A120 and A121 filters. I recently
noticed a sharp decrease in the output of
my A120 compared to the output of my A121
and I also noticed excessive distortion
in my A121 when the Q is high.

Maybe if enough of us plead with doepfer
they'll translate the service manual to
english.

Ethan