[sdiy] arp odyssey unusual bug - fixed

[Rob B]

Yeah, those electromechanicals on the Oddy especially, are really crap! I
mean, they are tough, but the seem to have taken on all sorts of corrosion
and such.

I should have thought of that, but what you spoke of bears the need of
intimate knowledge of that particular synth, the answer is not empirical. ;)

I try not to get intimate with other ppls synths.. It causes bad relations.
;))

But, in your case, perhaps it would have kept this from happening *had*
someone, er, stuck the plug in there once in a while! ;))

Okay, getting way off topic..

Rob

----- Original Message -----
From: <leaf at babble.vibrant.org>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, November 06, 2001 7:45 PM
Subject: Re: [sdiy] arp odyssey unusual bug - fixed


> Wow.  this turned out to be quite a sneaky bug.  It wasn't the
> voltage memory, it wasn't the keyboard control section, and it was friggin
> near impossible to reproduce in a consistant fashion.
>
> Turns out the cv-in jack was no longer consistantly making contact, so it
> was cutting out the cv from the keyboard, hence the pitch not changing.
> Furthermore, there were some magnetized iron shavings that had stuck to
> the cv-out jack, and so playing keys would sometimes close the circuit.
>
> One cv-jack later and my odyssey is better than ever!
>
> cheers
> Phil
>
>
>
> On Mon, 5 Nov 2001 leaf at babble.vibrant.org wrote:
>
> > hello,
> >
> > my arp is behaving in quite a curious way - when i play a note, i get
the
> > same pitch for almost all keys.
> >
> > if i play a low note, i get the proper pitch, and can then play roughly
> > the lower half of the keyboard correctly, until the note gets stuck
again,
> > at which point only the bottom note or two will unstick it.
> >
> > Even weirder: if i play two notes at a time once it's stuck, it will
> > continue playing the stuck note pitch, but the second note will be at
the
> > proper interval away from the first pitch - ie the proper pitch isn't
> > respected but the difference between the two notes is still determined
> > properly.
> >
> > What is going on here?  I checked the keys and none of the j-wires are
> > stuck.  Is it possible that the cv memory is latching up?  Any ideas are
> > greatly appreciated, I love this synth - it's one of the rare ones with
> > the moog filter =-)
> >
> > cheers
> > Phil
> >
> >
>
>
>