Hello!
I bought a fireface uc several months ago and I have this problem with it:
Sometimes when I turn it on, if I play a track in foobar, or ableton for example, it doesn't play at the correct pitch. This issue seems to remediate if I change the sampling rate, but there is a more subltle problem. Even when it seems to be playing at correct pitch sometimes the sound is bad. I feel it mostly in the kicks of the tracks, sometimes the kick sounds ok (full and punchy, you can perceive very well the transients), but sometimes it sounds really bad (the transients are blurry, and the low end undefined).

Do you guys ever encountered such a problem with your interface? I run it on windows 10 with the latest drivers and firmware.

Thank you!