i had a couple dropouts in an optical-in recording that sound like cd skips. i was not very happy about it, but at least there were 10 other tapers there. I don't know if it was my ADC or the JB3. I am waiting for the DAT or CD from the guy that was patched out or my SPDIF output to see if he had similar problems. If not, it could be because I ran the JB3 for 12+ hours straight that day.