[sdiy] VCO bleed through to other modules

[Rykhaard D.A.M.I.A.N.]

On 3/23/06, Jim Bob <c10h14no2i at yahoo.com> wrote:
> I had the power for the modules daisy chained from one module to the next.
> I thought that might  be the problem, so I hooked the VCO directly to the
> power supply (disconnected the bi-n-tic to get it out of the equation for
> now), and it made no difference!!  Wiring the noise module directly to the
> power supply made the crosstalk more quite, but not much.

;)  Remember earlier in a reply, I'd mentioned that I've NEVER had
crosstalk before? :O

This morning, whilst finishing my latest panel, I powered up - using
White Noise into 1 of my 2 SVFs, to ensure things were working .......
Turning the Cutoff on the 1st one, didn't quite seem to work very
well.  Where-as, adjusting the +Envelope Generator control, had a HUGE
amount of Cutoff effect.

I thought that odd. :O  So - removing the White Noise output to move
it into the 2nd VCF, JUST as I unplugged it from the Input to SVF #1,
I heard CROSSTALK. :O ????  Plugging the WH out into the 2nd SVF's
input, cancelled this - but the Cutoff #2 and the +EG #2 controls, had
the exact same effect.

Turning the machine off and flipping the panel around to see what the
problem was:

I found the the +V and -V supply lines to both of the Cutoff controls
(which are tied together) were NOT hooked up to the +V and -V
SUPPLIES!  Ummmmm duh. :O  Haha.

Remedying that - completely took care of the crosstalk, as well as the problems.

I wonder if something like THIS, could be a trouble with your system (as well) ?

Side note - for those that haven't yet built, the 2nd VCF option from
the Electronotes ENS-76 series - build it, if you want an evilly
screaming resonance, especially when it's overdriven! :O :O :D :D  I'm
taking the machine up to the lab tomorrow, to finally, start sampling.
 Sometime later tomorrow, there'll finally be samples up on my sdiy
page, of a fair # of things, from the machine, so far. :)

--
Take care,
Warmth and Peace,
Ryk

My NEW webpage home:
http://www.sdiy.org/damian/index.html - still transferring all from
the old site - Mar 2406

http://deathlehem.bravehost.com/damian.html - my modular synthesizer,
D.A.M.I.A.N.;s webpage