cliveb;146937 Wrote: > Unfortunately, the article by Steve Nugent that you cite is utter > hogwash. His thesis regarding the superiority of computer based > playback over CD is founded on the completely erroneous axiom that the > master clock in a CD player is in the transport. It isn't.> > > > > > > Hogwash eh? > > > > How many DAC's and transports have you actually opened-up? > > > > If you had done this as I have, you would have found that ALL > > Transports have a master clock that is both a PLL and part of a spindle > > speed control system. This is why I have installed Superclocks in 100's > > of customers Transports in order to reduce the S/PDIF signal output > > jitter. It is also the reason why rewriting a CD with a low-jitter > > writer such as a Reality-Check makes such an improvement in the > > Transport output jitter. The pits are more accurately located and > > easier for the Transport to read, and therefore the PLL and master > > clock are less effected due to less jitter as the pits are being read. > > > > On the other hand ONLY DAC's that do upsampling contain an oscillator > > or clock. 99.9% of DAC's that do not upsample do not have ANY > > oscillator at all. They depend entirely on the recovered clock from > > the S/PDIF, AES or Toslink input in order to function. The "Receiver" > > chip does this clock recovery. > > > > Perhaps it is the nomenclature of "Transport" and "DAC" that has you > > confused. In a CDP, they are of course combined. > > > > Steve N. > > Empirical Audio > > Manufacturer
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