I've never heard of the problem occuring in the XP30, however, I wouldn't be surprised if it did.

The XP50 could be upgraded as earlier serial numbers has FLASH ROM that could be updated by floppy. Later serials cannot. That's ditto for the XP60 and XP80 even though the Roland denmark site (www.roland.dk) has upgrades for these very instruments on their downloads page.

To see if it happenes on your XP30, open up a sequnecer program, record on track 1 (or any track) and go in to the sequencers micro edit window. If you see Channel 16 information on track 1, then you have the problem.

So if you have 16 track all with mistaken info from channel 16, you will hear lots of slop. Just use your micro erase to get rid of the tracks channel 16 information.

The Infamous EPU.