Tidal/qobuz hi-res track vs a 44/16 track upsampled in Roon?

[Marian (I stand with Ukraine)]

Why DSD quantization errors are always correlated with the signal

Since the term “uncorrelated DSD quantization/modulation noise/error” keeps coming up in discussions, I thought it would be useful to put this issue to rest and demonstrate there is no such thing. The question we want to answer is: can we design a 1-bit quantizer (or modulator) so that the quantization error of the two-level output signal is not correlated with the continuous input signal? According to the signal theory, the answer is “no”. This is the mathematical proof. First, a couple of def…