I am confused about "no jitter." When I was looking at different DDCs, I came across this review about the Singxer SU-6 model, that I ended up purchasing. The reviewer performed measurements and at that time the SU-6 had the lowest jitter of units they had tested, but there was still jitter.
In addition, the reviewer discussed noise and said:
The second issue that a good DDC or Streamer will seek to address is electrical noise. You don’t want noise from your source causing your DAC to perform poorly. Noise can have a direct, audible effect, such as hearing GPU-whine through your headphones/speakers, or it can have indirectly-audible effects. For example, causing clocks in your dac, or other circuitry, to perform sub-optimally.
Some dacs are more immune to this, and some will even have full galvanic isolation to in theory prevent any noise getting through entirely. But many smaller dacs are much more susceptible to it.
