Yes, the Devialet digitises all analog inputs very early in the signal path. That suggests there isn't much point in using an external DAC in front of it unless the DAC adds some particular colouration (i.e. distortion) that you particularly like.
Edited to add: ...unless of course you've run out of digital inputs on the Devialet!
Edited to add: ...unless of course you've run out of digital inputs on the Devialet!
Roon (Mac Mini), Wilson Benesch Full Circle, Expert 1000 Pro CI, Kaiser Chiara
Warwickshire, UK