OBERHEIM SYNTH

And finally, this is the extent of my info on the subject. From harmony
Central:

 

Memory is a significant issue with the OB series of instruments (well any
instrument with memory) in that it will do some pretty crazy things if the
memory is bad or scrambled. Sometimes loading the memory is not enough. If
problems still persist after loading the memory and replacing the battery,
you may have to follow the procedure below:

Set unit to manual mode
pick patch A1
Turn every pot a couple times
Turn on and off every switch a couple of times.
This includes all the page 2 stuff also.
After the above, set a simple patch that you can easily identify. One
oscillator, wide open filter, gate like envelope.
After you have the patch, write it to memory location A1. 
Verify the patch is there by switching to another patch and then returning
to A1.
Once verified, write this patch to every memory location. A real pain for
those with 120 programs.
Load your program tape.

Scrambled memory creates issues because many times the value held in memory
is is outside the memory address range. So where the expected value is 0-255
and the actual value is -1,304,495. CPUs do not do well with this type of
issue. Rotating the knobs allows the instrument to create a value within the
expected value.

Wes Taggart
Analogics
http://www.analogics.org/

 

  _____  

From: oberheim@yahoogroups.com [mailto:oberheim@yahoogroups.com] 
Sent: Monday, August 24, 2015 10:23 PM
To: oberheim@yahoogroups.com
Subject: [oberheim] Re: Autotune on OBXa suddenly shutting down all voices

 



So I finally figured out the problem with this machine. I was on the phone
with Bruce Forat about my Linn 9000 and he suggested disabling the midi kit
and taking the machine back to stock. I did so an autotune works fine now. 

 

Unfortunately my memory seems to not be working anymore on the OBXa though.
I can only use manual mode. Anything I save to memory doesn't work. Even
loading the presets via tape backup leaves memory not working correctly. It
seems like some things change with the changing of patches i.e. Saw to Pulse
etc. but the sound that comes out is just a slow attack rumble/whine of
dischord. 

 

So any ideas there? And I'd REALLY love to keep this MIDI kit in. I emailed
Tony at Encore MIDI but as per usual I get no response. So any ideas there
are welcome too. 

 

Sincerely,

Rich Clarke