Okay, I see this on the Doepfer DIY page:

"Especially for the first A-100 VCFs and VCAs (A-120, A-121, A-122 and first versions of A-130, A-131) the audio inputs have been designed to avoid distortion with standard A-100 signals (e.g. VCO). Lowering the input resistors will allow distortion for these moduls too."

So can I solder a 100k-Ohm resister in parallel with the input resistor to boost the input level More crucially for me as someone who can't read a circuit board, which one would that be

thanks!
Ernst

--- In Doepfer_a100@yahoogroups.com , "E Karel" <eklkrl@...> wrote:
>
> Hello,
>
> I've noticed this too about the A-121. There is information elsewhere about modifying an A-120 for increased input gain; would it be straightforward to modify the A-121 to get more gain as well
>
> Has anyone done this
>
> Ernst
>
>
> --- In Doepfer_a100@yahoogroups.com , "Michael Wagner" <michael.wgnr@> wrote:
> >
> > Ever since I own an A-121, I suspected, that its output is quite low
> > in comparison to the plain oscillator output level. Yesterday I made a
> > comparison between the A-121 and the A-105, that I received recently.
> > I routed a sawtooth from the A-111 to both of their inputs. I tweaked
> > the Input attenuator of both filters so, that the levels are just at
> > the point before the input signals are distorted by the filter. The
> > filters were both fully opened without any modulation or resonance. I
> > normalled the A-105 output to 0db deviation from line level in my
> > little mixer and then checked the output level of the A-121, which
> > seemed to be around 20db lower in output. Is this the normal behaviour
> > of this filter
> >
> > Thank you for any assistance in this,
> > -Michael
> >
>