SergeModular

Dear John,

thanks, I checked the archive. Cuari7 asked the same in 1881, John P.
answered that it is possible to cure the [UAP] 2VCA bleed thru by
adjusting internal trimpots - but no details found.

Hi John P., hi Cuari7,

do you mind giving me some more details on what exactly needs to be
adjust - and if you succeeded on that? And what exactly did you do to
solve your bleed thru issue?

Looks like these two can be solved. Ahhh…that only leaves this dreaded
TKB Clock/KP to [VCM] bleed thru to be solved. Hopefully someday…

Thanks much,
kind regards
Jan-Hinnerk

> Date: Sat, 13 Dec 2003 08:41:37 -0800 (PST)
> From: john duval
> Subject: Re: UAP as DualVCA: bleedthru
>
> not being an electrical engineer i can't help you much
> on this one except that this has been a subject of
> much discussion on the list in the past. The VCAs on
> the UAP don't attenuate to 0db if memory serves. I
> have also had this experience with the UAP in my
> system...which is one of the reasons i went to Dual
> Channel Stereo Mixers and the QVMs on my setup. I
> believe there is a work around for this but i'm not
> sure. In my tests on your patch i forgot to use a
> UAP..i used a DSM instead. I'll go back and test it
> again useing UAP later on today and let you know the
> results..as i still have your patch (in modified form)
> up and running. Just about anyone else on this list is
> more technicaly savy than i and should be able to help
> you out. I'm really surprized at the lack of response
> so far... or have they all posted to you privatly??
> Kind regards
> John DuVal
>
>
>
> ---metafoetus2002 wrote:
>> Dear Smog,
>>
>> done further patches with my [TKB] and Animal and
>> having loads of great
>> fun with this enormously compact system. But this
>> one thing puzzled me.
>>
>> - Set the [UAP] to DualVCA
>> - [NTO] sine in [UAP] input 1
>> - [PCO] sine in [UAP] input 2
>> - [UAP] Pan/Fade to leftmost position
>> - [UAP] Gain to leftmost position
>> - 1/4" cables going from [UAP] output 1 and 2 to
>> mixer
>>
>> Result:
>> - [NTO] and [PCO] bleed thru to [UAP] output 1
>>
>> Can anybody (un)confirm this?
>>
>> On top of that, even with nothing patched but just
>> the 1/4" cables
>> going from the [UAP] outs to mixer , I can still
>> hear the [NTO] and
>> [PCO] bleeding thru to both outputs. If I patch the
>> DTG's to oscillate
>> in the audio range, I can them going, too. John P.,
>> does this look like
>> the grounding issue you described on Egres/Wizardry
>> intro?
>>
>> Thanks in advance,
>> best regards,
>> Jan-Hinnerk