I had the same problem until I added the Bus Access module to
buffer the pitch CV. Then the problem went away. Ditto for A156 -
produced pitch CV.

Joe

--- In Doepfer_a100@y..., "duffnuff" <duffnuff@h...> wrote:
> i'm having problems performing simple portamento using the
> a171 vc slew limiter. when i apply the a171 slew limiter to pitch
> cv it results in serious intonation problems. i went back and
> checked the a190's scale adjustment w just the a190 and an
> oscillator, checking across 4 octaves w a tuner, it's fine.
>
> seems my a171 will not pass cv cleanly regardless of slope. it
> causes portamento, will adjust from slow to fast, but notes are
> wrong.
>
> when i patch the a190's cv1 output to the a171, then to the osc,
> middle C drops 1/4 step, and intonation goes completely out of
> whack. this occurs even when using only one osc. very
> frustrating. completely unusable. that's w no slew applied. i
> also taped the middle C key down and left it for several minutes
> but no change in pitch during that period.
>
> could this possibly have anything to do w using non-doepfer
> osc's i recall having to alter the scaling of the a190 when i
> began using it w a pair of ASys rs95's. once the scaling was
> adjusted they played perfectly together, except now when the 171
> intercepts the pitch cv, then the a190's scaling wants to be
> adjusted back down to doepfer's default position.
>
> any thoughts is there a bias adjustment i don't know about
> within the 171
> -duff