It definitely is not bit-perfect any more, as well as after any other digital signal processing.
What’s more important, though, is if one is perceiving it as degrading the sound - the mind’s susceptibility to biases can play tricks and spoil all fun…
Maybe it’ll take the uncertainty off your mind to read through @DrCWO’s excellent write-up regarding measurements of Roon’s DSP volume control effects, in order to find that its contributions are orders of magnitude below the threshold of audibility.