[sdiy] Glide circuit, how possible?

[john mahoney]

In the circuit shown, the 4051 selects from 8 wah frequency pots. Glide would be simple to add if the 8 wah frequency pots were replaced with 8 wah frequency control voltage pots, and the resulting CV was sent to a voltage controlled resistor (VCR). Then, the CV could be run through a standard lag circuit for "glide." The VCR would replace the original wah frequency pot. Perfect, right? Nope.

Minor problem #1: voltage controlled resistors don't really exist. This is the type of situation where a CA3080 OTA or a Vactrol is usually employed.

Minor problem #2: That's the limit of my technical knowledge! I really don't know if an OTA or Vactrol would work well in this application. Hopefully, someone else will the baton* and run with it. (Please?)
--
john


* Pardon the track & field terminology, but the Olympics are coming! :-)


----- Original Message ----- 
  From: j s 
  To: synth-diy at dropmix.xs4all.nl 
  Sent: Tuesday, August 03, 2004 9:38 PM
  Subject: [sdiy] Glide circuit, how possible?


  Hello list! My name is Jason Stout and I need a reality check, and some advice.

  How possible, or practical, is the addition of a glide circuit to this sequencer:

  http://geofex.com/Article_Folders/udrand.htm

  How would it be done?
  I can't see it happening, but if it is practical, I think you guys would know. 

  Thanks!
  J
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