Doepfer

Hello. I recently started to build a modular system using mostly
Doepfer modules. So far, I am very satisfied with the system, but I
noticed a few odd things.

The first one concerns an A-130 linear VCA: It inverts the incoming
signal! If I patch an ADSR or LFO into the Audio In, the output signal
is an inverted variant of the input. Is this common behaviour, a
faulty unit or something else? And what could I do against it?

Furthermore. I've got two problems with the R2M:
- It doesn't output a CV2 (the pressure sensor Output).
The second problem is concerning the CV1:
I patched the output of CV1 directly to the 1V/O input of my A-111 and
patched the sine out directly to the mixer: And there is an annoying
crackling sound I hear. I played around a bit, tried the other A-111
and the M15. On all the same. As long as I keep the finger on the
ribbon, there's this crackling sound. When nothing touches the ribbon,
it sounds clean. Is this normal behaviour of the R2M or did I just get
a bad unit or something?
I uploaded a sample of the "crackling sine wave":
http://wasted.ch/mw/r2m_clicking.flac (around 500 K, FLAC audio file)

Good bye,
-michael