by Bruce Graham » Fri Oct 21, 2016 3:10 pm
Perhaps a software reload? Could it be a corruption of some kind?
If it is an "Out Of Phase" condition, and you are returning the signal as a balanced signal (XLR or Tip, Ring, Sleeve, through a balanced processor), the Phase button should correct. If the signal is returned un-balanced (Tip, Sleeve) then the Phase button, as Peter has pointed out, will have no effect, Weird that it would change all of a sudden when using out board gear???
If you are having difficulty internally (ie: aux send to an MFX or UFX card), then out of phase should not be possible as it is all internal of the console.
Phil has a point as well. Reload a session that you know was good and see if it still is a problem. This might help to point to the problem as well.
Post back
Cheers
Bruce