Doepfer

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