In amp what is PRIO

There’s a column in program mode called PRIO in the AMP section. You can turn it on/off. What is it?

Note priority. If you go over 32 notes it has priority over other notes to keep playing.

Thanks! Did not know that either. That would be great if youre running a "backing track". Is this only available in the latest OS version or is this an old feature?

This is a JJOS feature... I don't know how far back it goes.