Crumar Musical Instruments User Group.

--- In crumar@yahoogroups.com, Steve Ridley <spr@...> wrote:
> > Hmmm... Now I can't remember - I'll have to hook them up again to be
> > sure but I think the one with only one good voice was the one with
> > 3328s. The voices that have failed are very specific to the note
> > order. If I press one key and keep it held down, then press another,
> > etc... I can determine how many voices of the six are working. They
> > are always dead in the same order, such as: 
> > 
> > 1-quiet, 2-working, 3-working, 4-working, 5-quiet, 6-quiet
> > 1-quiet, 2-quiet, 3-quiet, 4-quiet, 5-working, 6-quiet

Well, in my chip swapping, I've managed to make things worse... 
Here's the current state:

SSM2044 1-bad, 2-working, 3-working, 4-bad, 5-bad, 6-bad
Working voices coming from Lower, No Noise generator audible

CEM3328 ?, Lower making warbly noises, No Noise generator audible

> It would be interesting to see if the faulty voices are all
> one or other side when you go split.

Does the above answer this?
 
> I'll see which version schematics I have and suggest a few useful test 
> points to measure.

I have the schematics for the later revision with CEM 3328 VCFs

> > I'll have to give that a try, although from what I recall, the noise
> > was audible. I'll write again as soon as I get them tested again. 

I'll have to see if I can reverse my chip swapping and get back to
where I started to see if the noise actually did work.  At this point,
the instruments are accepting data loads, but don't the patches are
not playing correctly at all so I definitely made a mistake.

TGIF!