What I find interesting in this interview with Peter Qvortrup is, he is making digital equipment now, but says he improves the sound quality by slowing down the sampling rate. He says (if I understand it correctly) that the quick change of positive to negative in a bit causes a slight overshoot, a distortion, the faster the sampling rate, the greater overshoot distortion. Sort of contradicting the generally held view that faster sampling rates will make digital sound more analogue.
Whether you like his equipment or not, PQ is one of the great thinkers (and characters) in the industry.