[sdiy] Pitch-to-voltage converters

[Harry Bissell]

It will work well for that, but it will only update every other cycle...

What ~are~ you reverse engineering ? Can you tell me without
killing me ??? 

H^) harry 

 
----- Original Message -----
From: David G. Dixon <dixon at interchange.ubc.ca>
To: 'Harry Bissell' <harrybissell at wowway.com>
Cc: 'Synth DIY' <Synth-diy at dropmix.xs4all.nl>
Sent: Thu, 18 Feb 2010 12:14:38 -0500 (EST)
Subject: RE: [sdiy] Pitch-to-voltage converters

> The EFM one was based on the Moog design "Etherwave PV converter" and only
> works if you
> have a good stable square wave. That is the tough part.
> 
> Also, it divides the input frequency in half so there is at lease 24ms
> latency on a low
> guitar E string.
> 
> I'm familiar with all the commercial units, we can talk :^)

Harry, for now I'm only interested in tracking a sawtooth wave from a
saw-core VCO, so your circuit should work swimmingly.  I don't even need the
trigger/gate stuff; just the F-V conversion part.  In fact, I don't even
need the antilog circuit, since I only want to use the voltage to change the
speed of LFOs in proportion to the sawtooth frequency (go ahead, guess what
I'm trying to "reverse engineer").  However, I may want to build a more
"general purpose" unit a bit later, and then we can talk.


-- 
Harry Bissell & Nora Abdullah 4eva