Hi Tobias, I’m aware that the clock at the switch has no importance from the timing perspective. Still, normal crystals are pretty noisy. The Ultra clock is one of the best in the world. It has phase noise levels above 130 dbv at 10hz. When you swap the crystal by this clock it’s clear in seconds. You feel almost like a life attendant at a concert. At first when the clock is still cold, the phase noise levels are not that good, but after a few hours it’s already much better and only after 48 hours it’s fully stabilized.
In the first few hours it only gets better, until it decreases again after 6 hours. Slowly the DAC clock is pushed out of phase. This happens everytime when the stream becomes too clean.
I think when the signal is weakened by the filters and edges become less steep due to smoothing then everything is okay. I’m really positive now that it’s not only about noise. A stream can get too stable as well and cause trouble to the DAC clock.
