Jason has stated a number of times that Bifrost is galvanically isolated. The real 'kicker' with USB, is the HUGE variance of USB implementation, electrical noise, number of other USB devices on a bus (you can be plugged directly into a single USB port and the motherboard can be sharing that USB bus with other devices). One user can plug in and have a clean, quiet experience. Another can plug in and get all sorts of noise. Add to that, the effect on your USB bus timing/noise when various other applications are ran.
In my experience, it's a very difficult thing for a USB device to eliminate all possible USB related issues. To date, I've yet to see a USB audio device that always worked, never dropped out, zero noise, etc. YMV, but that's been my reality with USB and the audio software that uses it.
Is this true, some usb power noise with the bifrost? WTF, can't believe this, in these day and age, a good company would offer dacs without galvanic isolation build in and tested..
So what happen now, will I have usb noise with the bifrost.. if yes, i'll remove the usb option from my order..
We all want and need pitch black background is this so hard to isolate noise?
bah, I think i'll keep the usb anyway and try it out