Hello,
 The only info that I could find was the last update to the Xpander's ROM. I don't know if it'd be the same for the M12.

-----Original Message-----
From: synthparts <synthparts@...>
To: oberheim@yahoogroups.com
Sent: Tue, Jun 15, 2010 7:20 pm
Subject: [oberheim] Matrix-12 voice board ROM versions