[sdiy] arp odyssey unusual bug

[leaf at babble.vibrant.org]

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