Chris,

I can't comment on the Duet as I don't have one.

However, there are only 2 variables in the transport (PC vs SB via
S/PDIF) equation:

1) the bits - are they OK? - answer: Demonstrably yes in both cases. We
can discount this.

2) Jitter into the output stream at the transport end - answer: we get
different "numbers" (pattern) of jitter, so they are different. With
some DACs we would expect this to translate into an audible
"difference". With other DAC's the slightly different levels/patterns of
input jitter will have no effect whatsoever on the audio emerging from
the analogue stage of the DAC. 

However it is impossible to conclude anything from this...except that
some people will prefer the sound from one approach and some will prefer
the sound from the other.

Interestingly, the use of a PC with a coax S/PDIF connection to a DAC
can cause issues with transmitted RFI/Noise. 

I don't understand your point about TCP/IP being irrelevant - to me is
critical since it lets me keep the clock and the jitter aspects locked
inside the SB - the PC is completely out of the jitter equation. On ANY
PC+card solution, jitter will be influenced by what is happening in the
PC. This is simply never the case in an SB-based solution.

Anyway, interesting discussion!


-- 
Phil Leigh

You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...
SB3 (wired) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF
Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x
LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue
Jeans Digital,Kimber Speaker & Chord Interconnect cables
Outdoors: Boom
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