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Subject: Re: [korgpolyex] VCF Drift Problem

From: billmeirelles@...
Date: 2011-07-28

Hi Gordon,

I just tested it with the EG INT set to 0, same results.
My Poly has a external CV IN for the VCF FREQ but it
has a switch wich turns both positive and negative CV
off, so when it's switched off you can say that it's
the same as it has no external input at all, with no
cables connected to the input, still the same results.
I've done all the mods 4 months a go and was using
the Poly all the time with no problem, it started to
act strange yesterday.
Please have a listen to the sample I've uploaded.

Thanks for all your help,
Gabriel Rodrigues

Em 27/07/2011 19:06, Gordon JC Pearce < gordon@... > escreveu:

On Wed, 27 Jul 2011 16:56:25 -0300
billmeirelles@... wrote:

>
>
> Now I can here it's happenig when in 12dB too, looks more like the voltage is
> changing just like a rando LFO will do but it comes a go, you never know when.
> Can be a bad cap, a broken solder or? Any ideas?

Stop guessing and start testing. Begin at the VCF CV input and work back. Check to see that if you hold a key with the VCF EG amount set to minimum that it actually holds a steady voltage.

The joysticks seem to lose their dead zone and go noisy. This makes the pitch bend, VCF mod and VCO mod go apeshit.

--
Gordon JC Pearce MM0YEQ <gordonjcp@...>