OBERHEIM SYNTH

I have a question for anyone that has used the X-Mod on an OB-X.  When
I use X-mod (aka cross modulations, aka linear FM), each of my 7
voices produces a different pitch, some more different than others. 
Now my board is in pretty darn good (but not perfect)
tune/calibration.  Because of this pitch problem, when I use X-mod
have use unison and X-mod has been delegated, for the most part, to
making strange noises.

Now my question: Is this the best I can hope for or is there a way to
solve this pitch problem?

My guess is that this is the nature of X-mod and unless a board is in
perfect, perfect calibration, this pitch problem should be expected. 
(And given the age and design of an OB-X, perfect, perfect calibration
is impossible.)  It is also my guess that this pitch reality is one
reason why X-mod did not make it to the OB-Xa and the OB8.

Any thoughts out there?

I can't remember which midi mod I had but I gave up.  My OBXa did so 
many weird things after the mod.  I ended up giving it away.  This was 
pre e-Bay.........

Charlie

On May 8, 2005, at 7:09 PM, nelsonj_sce wrote:

> I have a question for anyone that has used the X-Mod on an OB-X.  When
> I use X-mod (aka cross modulations, aka linear FM), each of my 7
> voices produces a different pitch, some more different than others.
> Now my board is in pretty darn good (but not perfect)
> tune/calibration.  Because of this pitch problem, when I use X-mod
> have use unison and X-mod has been delegated, for the most part, to
> making strange noises.

In a message dated 5/8/05 6:10:18 PM Central Daylight Time, 
nelsonj_sce@... writes:

> My guess is that this is the nature of X-mod and unless a board is in
>  perfect, perfect calibration, this pitch problem should be expected. 
 

 I would think this is correct. My OB-Xa (now sold) wouldn't tune anywhere 
near the accuracy needed to maintain consistant results from a cross-mod 
polyphonic patch (if it had that feature, that is). I would think that the OB-X would 
be a similar situation. But who knows, I could be wrong. Maybe there is 
another OBX owner on this list that can comment?

 Andrew