Really hard to think of title for this, I have a UX1 and use it with Reaper through my Macbook Pro, everything has been fine for years, suddenly some (only some!) of my old sessions now aren't playing the guitar parts, they are there, very low down in the mix sounding garbled....change to mac sound output and plays fine, so its not repear or my mac, so must be the UX1, loaded up session today and guitar was there, phew.... after 45mins it went again!
I've checked all my uX1 software is up to date and restarted everything, any ideas?
to be clear, the programmed drums, bass and vocals are still playing fine.