[sdiy] Jp-8 head scratcher

[The Laboratory of Sound]

Hi,

I am having a similar problem with an OB-Xa as we speak. On two voice 
cards one oscillator will tune ok and remain stable, but as soon as you 
hit autotune it will deviate. Of course I first made the mistake Florian 
describes, i.e. forgot to disable autotune while tuning, but the problem 
is not related to that mistake. What I noticed is that the trimpots for 
these particular oscillators are more finicky to adjust than the others, 
so my hunch is that things will improve when I replace those. Could 
something similar be going on with the JP8 ?

Cheers,

Jack



On 2013-11-07 09:44, Florian Anwander wrote:
> Hello,
> 
> Maarten answered that only to me:
> 
> On 06.11.13 22:54 , Maarten Halmans wrote:
>> Hello Florian,
>> 
>> it seems more a scaling problem. Pitch differences become bigger 
>> towards
>> the high notes, it also seems a linear deviation.
>> Best,
>> Maarten
> 
> As far as I understand it, the autotune does adjust only the absolute
> tune, not the octave tracking. So you simply made a mistake while you
> adjusted the octave tracking. I assume you enabled autotune in
> between, and forgot to disable it again when you adjusted the octave
> tracking manually. The synth must be adjusted manually completely
> perfect - it must sound like an angel without using autotune.
> I recommend to do the complete tracking and absolute tuning
> adjustment, then leave the synth switched on, close the panel, wait
> for another 30 minutes (the synth will heat up a little), then check
> the tracking and tuning again.
> 
> Florian
> 
> 
> 
> 
>> 
>> ----- Original Message ----- From: "Florian Anwander"
>> <fanwander at mnet-online.de>
>> To: "Maarten Halmans" <diy at artefacts.nl>
>> Cc: <synth-diy at dropmix.xs4all.nl>
>> Sent: Wednesday, November 06, 2013 10:30 PM
>> Subject: Re: [sdiy] Jp-8 head scratcher
>> 
>> 
>>> Hello
>>> 
>>> Are the VCOs not in tune or is the octave tracking wrong?
>>> 
>>> Florian
>> 
>> 
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy