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Modification, Cv control over pan on doepfer a138s
MUFF WIGGLER Forum Index -> Music Tech DIY  
Author Modification, Cv control over pan on doepfer a138s
jonkers303
Has anyone tried?

Just starting research on the subject. Would make those small stereo mixers even nicer.
cygmu
I guess this is a non-trivial modification. The obvious implementation of VC panning is to send a signal into two VCAs, which are controlled in opposite directions so that as one opens the other closes. So for the four signals in the Doepfer A-138s you'd need 8 VCAs.

Manual panning is much easier: just a pot with its wiper to ground will do the trick, as i for instance the MFOS Stereo Panning Mixer.

http://musicfromouterspace.com/analogsynth_new/STEREOMIXER2006/schemat icpage1.gif

My guess is that is the kind of thing the Doepfer module does, so there's almost none of the infrastructure you need for a voltage controlled pan.
jonkers303
Ah yes. You confirm what my research so far indicates.

I guess if it was easy doepfer would have put cv control there to begin with.

Thanks for the answer!
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