What you would say if Holo DAC is partially Delta-Sigma (at least in one bits section)?
They call it R2R, but is not for two reasons. One, becaue it is segmented architecture (only a portion of a ladder is pure R2R). Second, they add an additional compensation ladder that further breaks R2R uniform impendance matching and a dynamic current flow.
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hey call it NOS, but it is not, because NOS DAC do not involve internal digital filtering, but Stereophile tests of May reveal use of digital filters in so called 'NOS' mode (in all three tested sample rates).
These two cases of wrong communication practice should give a thought that it can be a Delta-Sigma decoding on a portion of the ladder indeed. Not a first implementation of this kind, some chip-DACs are doing the same things.