As Pwfletcher says: Plug the USB cable directly into the Mini and not a hub (if you are going to use a hub make sure it a powered one with its own wall wart). Because a) it will have direct access to the USB and because b) it will have sufficient power - remember USB carries 5v.
Yes a DAC will probably see USB differently then coax. Coax is coming in SPDIF, USB is coming in USB and then has to be converted to SPDIF.
Based on everyone's comments it is starting to sound as though the Bel Canto is very sensitive to signal level.
Yes a DAC will probably see USB differently then coax. Coax is coming in SPDIF, USB is coming in USB and then has to be converted to SPDIF.
Based on everyone's comments it is starting to sound as though the Bel Canto is very sensitive to signal level.