Understood. I just provided all that context in reply to your comment about the Mojo specifically… "I kind of doubt that. Attaching a Mojo to a Chromecast Audio (mini toslink) or to a transport like Allo DigiOne is not going to result in the same sound."
I wouldn’t doubt the designers of their own gear - not those two specifically anyway
If we are now talking about the S2 DAC, there are some measurements that show incoming digital coax jitter isn’t as good as it’s USB input, especially with 44.1kHz content:
I assume assume TOSlink’s jitter measurements would be either the same or worse (not better…).
The 192kHz jitter measurements aren’t too bad and I remember it sounding great when I had Roon up-sampling to 192kHz. It’s nice to have a DAC at this price that can support PCM192kHz and DoP64 over TOSlink too.
Jussi’s USB measurements are all very good, even with stock PSU, and slightly better/best with PCM768kHz and DSD512 per Jussi’s measurements.
It’s a superb DAC for sure. And when you power both DAC and USB source with battery, you fully eliminate potential for ground / leakage currents (through the DAC anyway) and it’s happy days indeed.