Im currently using my 192 and spdif to my apogee rosetta 200. I have the 2 lock lights lit on the apogee, showing the units are synced. I have the clock source set to external on the presonus, and the sample rates match at 48k. Im getting a lot of noise, clicking and crackling in protools now, since this setup. I was fine before the rosetta but really want to make this work.Am I missing something in the presonus software mixer maybe?