The NAD DAC1, that features a dedicated wireless transmission between the USB port and the DAC unit placed close to the amplifier, works very well with volumio and the pi.
There are no black-outs, pops or cracks. Concerning jitter, I prefer to use one of the non-default setting in the WebUI/System menu.
Also in the WebUI/Playback menu I prefer Volume normalization ‘no’, since I use Exact Audio Copy for ripping since EAC offers to normalize the volume.
Stig