Phil Leigh Wrote: > > It's my opinion that given the same bitstream and similar levels of > jitter, the transport is "out of the equation" as far as eventual > analogue sound quality is concerned. The focus then shifts to the > DAC+cable (the latter for jitter NOT "freq resp"). > I think you are being slightly simplistic.
'Jitter' is only relevant at the point where the conversion from digital to analogue is made. Jitter at this point is a combination of the fundamental clock jitter of the transport, and any jitter added through the SPDIF interface (driver/cable/receiver) and the receiver's phase locking and clock circuit. It's not really possible to seperate out the 'transport's' SPDIF tranmitter, the cable and the DAC's SPDIF receiver because they act as a system. Thus if you have an imperfect SPDIF transmitter and an imperfect SPDIF reciever (which in practise they all are - especially given the poor specification of the interface), you are always likely to find that different combinations of transport, cable and DAC will perform differently. So really what you should be trying to do is to measure jitter at a 'reference' DAC with both an SB and CDP as sources. Then if you theory holds true, if the jitter levels and the bits are identical, they should sound the same. But change the DAC, and you are likely to change the jitter measurements too ... -- Patrick Dixon www.at-tunes.co.uk ------------------------------------------------------------------------ Patrick Dixon's Profile: http://forums.slimdevices.com/member.php?userid=90 View this thread: http://forums.slimdevices.com/showthread.php?t=25138 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
