Hi,

I'm new to these forums but have really learned a lot from them.  Triode
your applet works for peachtree idac although the dac uses an adaptive
usb 1.0 and so sounds better using the coax from the sbt. Very easy to
use and I appreciate all the effort you put into it.

I have used some of soundcheck's suggestions (quite helpful) and your
edo applet and could definitely notice a significant improvement in SQ.
Thank you both.

I had an idea to greatly reduce the jitter of an sbt that entails
modifying your applet ( or maybe it doesn't?).   This might not make any
sense so please feel free to throw darts or whatever at this idea.  In
my situation and possibly others here, the sbt is not close to the
pc/nas setup. Perhaps 20 or 30 ft.  I just run a long cat 6A eithernet
cable (thanks soundcheck--it does make a difference although I can't
believe I am saying that) from my pc to the sbt.  Then I could go to the
dac via either usb or coax which is a short 1m cable. Given the jitter
in the sbt is good but perhaps not as good as we all might like I was
wondering if the following idea is feasible: Could you use the usb
output of the sbt (using some version of the edo applet) to go to a low
cost usb to spdif box that would clean it up significantly and avoid
making any hardware mods to the sbt (thereby avoiding violating the
logitech warranty). The output of the spdif box goes into the coax input
of the dac but now the jitter of the sbt has been greatly reduced
(hopefully) and no one has to mess with hacking into the hardware
innards of the sbt.  Although if that is your thing then more power to
you.

I read from triode and John Swenson's excellent and well thought out
explanations that the edo applet may  not be able to do this currently
because it needs to query the dac to help set up the usb output channel
in the sbt. I suppose a usb to spdif box in between is going to make
that impossible.  However, maybe a simpler usb 1.0 pass through version
(or applet option) of the edo code would work to accomplish this? An
added bonus is that this would make the edo code even more versatile
since their would not need to be a dac query. Thus, the concern about
making it work with various dac brands would be avoided thereby creating
an even larger user base for this mod. Although it does increase the
cost to buy a usb to spdif box.  Or maybe I have no idea what I am
talking about (quite possible).

A question one might ask here is why not go directly from the pc to the
dac via usb?  I have tried it and I can tell you that long usb cables
are not OK for transmitting high quality audio.  Many dac mfr's warned
me against it and they were completely correct.  The sound degradation
was obvious and not pretty. On the other hand ethernet is adept at
traveling long distances and does possess transformer isolation at its
receiver. So what I am attempting to do is transmit to the sbt as
cleanly as possible over longer distances using ethernet and then
reducing the sbt jitter with a usb to spdif box (with short 1m usb
cable) and then go to the dac via spdif coax (again short cable).

Would appreciate any comments, etc.  on this idea.


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View this thread: http://forums.slimdevices.com/showthread.php?t=94512

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