I agree that the process of preparing an AC3/DTS file for use with the
Squeezebox is onerous, but in my experience it's the ripping that takes
the longest: once you've got a set of .ac3 or .dts files, running
spdifconvert once on the whole bunch then applying FLAC to them is
trivial.  (It's just two commands -- although I know the CLI isn't
friendly for most people.  Perhaps somebody could rig together a
front-end?)

In other words (to me personally but I think it's reasonable), the
relatively small amount of extra work required to go from AC3/DTS to
FLAC is worth it for the tagging.  Once you've got that far, you might
as well go all the way.

All of my multi-channel FLACs include the genre "Multichannel".  I'd be
quite happy to update my files to include any genre value which SBS will
recognise as an indicator of digital-only data.  (I also use the custom
tag "SPDIF_ONLY", set to a value of "DTS" or "Dolby Digital", which is
the definitive answer for my data as to whether it's unsafe for
analogue outputs; the genre is automatically populated based on that
tag.)

You could possibly guess that something was DTS or AC3 by decoding the
start of the FLAC and looking for the magic numbers that the receiver
itself would use to decide what to do, but that isn't as extensible as
using a genre or other special tag.


-- 
smst
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