NAC-N172/N272 has it a DSP-volume?

Hello,
do You know how the volume control is solved in the NAC-Nxxx and Unity I. Is there an
DSP-processor involved? Is the signal going through an AD/DA DAC or does it stay in analog domain?

They have a digitally controlled analogue volume control. Analogue sources remain analogue throughout.

It does work very well too.