The issue is that AES is a 110-ohm line and S/PDIF is 75-ohm, which
you've already alluded to.  You can't just change connectors and
cabling and think it will work, as an IMPEDANCE change is what's
necessary and it's usually done with a 1:1 transformer.

There isn't any advantage using AES over S/PDIF as the main difference
is flags in the bit-stream which are set for certain 'professional'
functions.  The audio-stream itself is identical.

If you want to run AES due to cable length restrictions of S/PDIF then
you'd want to use a transformer for proper impedance conversion at the
end of the run.  AES is capable of runs up to 100-meters, where S/PDIF
is usually limited to 10-meters.

Hope this helps.


-- 
Eric Seaberg

Eric Seaberg - San Diego
[EMAIL PROTECTED]
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