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It
depends on a number of things - there is more than one way t skin a cat
and
there are different algorithms used t convert the digital bitstream int
analogue data. Without getting t o technical higher resolution converters
will
push any smapling noise way outside the audible spectrum. Components in the
analogue stages will also have an impact on the final sound achieved. There
are
some awesome single box players around the Marantz CD-63 KI sig being one
example that springs to mind. There are also advantages to having two
seperate
power supplies, and keeping the transport on conversion circuitry in two
seperate boxes. This does assume though that you are feeding a digital
signal
int a good quality D-A converter, and not a 200 quid Sherwood job from
Richer
S unds.
As to
digital cables, a number of people cite the PC as an argument for why you
shoulc
only use cheap digital interconnects. The CD-Rom to system board cable in a
PC
uses a different method of transferring data to that between a transport
and a
converter - it is a 20 way (?) ribbon cable compared with a pair of
conductors
in an audi cable. There are measurable differences in analogue
cables. Skin effect for one which is caused by the interaction between
the
surface of the conductor and its insulator - which effects the timing of
different parts of the audi spectrum - I think that HF travels more slowly
than
LF but it may be the other way round. While some people may find it
difficult to
tell the difference between cables in the Audi domain, connect up a high
quality display device using different cables and more of us will spot the
difference imediately ( Ihave t say that I've got 200 quid's worth of
component
cables between my DVD player and plasma) Noone is quite sure why digital
cables
sound different. Jitter, or timing errors is the most commonly cited
reason.
I'm
opening myself up for some critisism here, but I have an esoteric cable
running
between my CD player and digital pre-amp, and there is a difference between
that
and cheaper cables. I did audition it blind - I didn't know which was which
when
comparing the two.
If you
want t know more there is an excellent book available (Amazon stock it) -
The
complete guide to High End Audi by Robert Harley ISBN
0-9640849-4-5
My
advice? Don't go there it starts to get *really* expensive. Even Phil would
have
a hard time sneaking some of my kit past SWMBO.
Tim
-----Original
Message-----
From:
Alan Cockerton [mailto:alancc@xxxxxxx]
Sent: 01 August 2001
20:16
T : ukha_d@xxxxxxxSubject: [ukha_d] CD
players
A bit off topic but I know we have some audi
buffs out there.
What difference does it make t the sound
quality
between using an expensive or cheap CD transport or interconnect lead
assuming
the AtoD conversion is being carried out in the amp, surly the
data
is digital,its ether there or not so how can it be changed by the
hardware?
Alancc
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