find a good and a bad voice.
- turn the rest off so you only have a 2 voice poly..
- then swap the socketed chips over on a good voice with the bad voice (maybe one of the ones that is turned off) until you can isolate the chip that is playing up..
3. Use the good voice as a way to monitor what the required levels are
I recently fixed my Oberheim Matrix 12 by doing exactly this and isolated the exact chip (an op amp in my case). I also fixed some other things while I was at it..
Top board should be voices 1-6, bottom board 7-12. However, I have found that the boards retain their voice allocation regardless of if they are at the bottom or top.
From: xpantastic@yahoogroups.com on behalf of mattvrazo@yahoo.com [xpantastic]
Sent: 04 September 2018 3:31 AM
To: xpantastic@yahoogroups.com
Subject: Re: [xpantastic] Xpander/M-12 voice volume variations
Sent: 04 September 2018 3:31 AM
To: xpantastic@yahoogroups.com
Subject: Re: [xpantastic] Xpander/M-12 voice volume variations
No, definitely not panning related (all are in middle).