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Old August 10th 11, 03:48 PM posted to uk.rec.audio
Jim Lesurf[_2_]
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Default Proms, 320k, and the sound of music

In article , Justin Sellors
wrote:

"Jim Lesurf" wrote in message
...
In article , Justin Sellors
wrote:


snip
Since you wrote "OGG/FLAC" I also tried '.ogg' and that also gets a
stream. Not checked yet, but I assume that it means that both stream
types are available, not that the stream codec changes without the
name extention altering.


Apparently it's a FLAC stream in an OGG container - this probably means
more to you than me!


Ah, yes. Sorry, the penny has now dropped! In effect Ogg is the transport
stream format/layer and that delivers the data encoded in the flac codec.
I'd been muddling up transport with codec.


Playing back with Foobar2000, the bottom left of
the interface panel shows "FLAC (a variable bit rate around 600kbps)
48000Hz stereo".


I just did a quick test and got a similar result averaged over about 10
mins. Averaged it came in a at just under 600kbps, but as you'd expect
it varied a lot with the music. So - although it averaged at just under
double the rate for the R3 HD streams - at times it peaked up to more
like three times the R3 HD rate.

This is quite interesting -
http://www.cesnet.cz/doc/techzpravy/...c-encoding.pdf


Thanks, yes. Looking at that I also found a couple of other English
docs on the work linked to the techzpravy page.


Interesting to see that they used Linux and open software. Goes nicely
with flac, etc. Quite a contrast to the BBC's closed Flash-controlled
approach.

Slainte,

Jim

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