DAC over USB on QNAP?

Hi,
think about to buy an QNAP …

so, did I understand that correctly?

Install the Audirvana .qpkg on a QNAP,
connect a DAC over USB on a QNAP USB port,
( have a ifi zen dAC )
and Audirvana see the DAC, so I can use it with
the Audirvana Remote App?

Will use the Audio out form the DAC, but there some QNAPs
with Audio out, can I use the Audio out form the QNAP too?

thanks