[sdiy] Yet another 292c Lowpass Gate audio sample uplaoded

[Scott Stites]

Hi,
I've been wondering - has anyone tried any Vactrols other than the VTL5C3 or
VTL5C3/2 with the Low Pass Gate?  Specifically, I have some VTL5C2's on
hand.  I figure that (obviously) different Vactrols will give quite
different response curves.  Question is, is this a good, bad or 'beauty is
in the eye of the beer holder' type of response?

Keith, Mark, Peter - ever tried this?

Thanks,
Scott


----- Original Message -----
From: Peter Grenader <petergrenader at mksound.com>
To: <synth-diy at dropmix.xs4all.nl>; <keithw at cix.compulink.co.uk>
Sent: Monday, October 14, 2002 11:28 PM
Subject: [sdiy] Yet another 292c Lowpass Gate audio sample uplaoded


> Peoples,
>
> To augment Mr. Winstanley's Lowpass Gate soundfile, I have added one of my
> own to my site which gives an example of the 292c circuit controlled by an
> extremely short transcient-type  envelope.
>
> Two things will be instantly evident when you hear it:
>
> 1)  No pop.  Do the same thing using a standard VCA,  with an envelope as
> short as the one I have used and the usual VCA crack*pop*snap will be
heard
> as it opens and reacts to the voltage applied.  The vactrol in the lowpass
> gate by comparison affords a slight smoothing of control voltages as the
led
> turns on.
>
> 2) The ringing in 'combo' mode.  When the Low pass gate is set so that the
> switch is on the middle position, one hears a mix of the standard VCA and
> the low pass gate in equal amouts.  The net effect of this is a
wonderfully
> natural sounding ringing  which is very audiblet with short envelopes like
> I've used here  Chalk this up to the vactrol LED now dimming off and the
> removal of the .0047 cap within the circuit.
>
> In the ate used in this sample I used polystyrene's for all caps which are
> directly related to the audio path. The other two are combinations of
> different types of caps in these places which was done intentionally to
give
> each a slightly different persoanlity.  I can't tel from Kieth's picture
> which type are on his, but they sound like mylars (one of mine uses those
as
> well).
>
> Another application hint for the lowpass gate is setting the output level
of
> the control source you're using to open it with to the bare minimum
required
> to turn on the led in the vactrol - just a touch past the signal being too
> low to excite and open the gate.  I usually use my Blacet EGs for the
LPGs,
> where John's output level pots come in very handy for just this.  Using
too
> much juice will cause a little clipping.  Backing it off will yield what
> you'll hear in this sample.  I assume this is due to the signal levels of
> the Buchla the circuit was designed for.
>
> To give this a listen, go here:
>
> http://www.allegrobikes.com/synth.html
>
> click on 'Son of Frankensynth"
>
> Scroll down to Homebrew modules link
>
> Scroll down to the Low Pass Gate listing on that new page
>
> click on the 'submit to the LPG' button and you will be directed the the
> correct download link for the soundfile.
>
> To jump there immediately, simply go to:
>
> www.allegrobikes.com/lpg.html
>
> enjoy.
>
> or not.
>
> P
>
>
>