Yahoo Groups archive

Doepfer

Index last updated: 2026-04-29 00:15 UTC

Message

Re: pitch problems using a171 vc slew limiter

2002-10-25 by duffnuff

hmm, ok.  thanks for the suggestion but i'm confused as to how i 
would patch it in.  does it work just being on the bus?  so i start 
drawing cv from the 185 instead of the 190?  
-duff


--- In Doepfer_a100@y..., "Joe Buechler" <buechlerjoe@t...> 
wrote:
> 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

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.