On my late 2013 Mac Pro with OSX10.11.1, I just installed the most recent version of UC and updated the firmware on my 192. I am having a problem with audio progressively getting more noisey and "digital" ...as if bit-crushed. I found that I can resolve the issue if I change the block size in UC and then back to the previous setting. The problem comes back after a little while and I cant pin down the root of the problem. It happens in PT 11 frequently. Ive adjusted the buffer size with no effect on the problem.
Any ideas what the problem might be? Thanks for the help!