[vorbis] intro to compressed audio tutorial

[Nemo - earth native]

On Wed, Feb 06, 2002 at 11:26:31PM -0600, Graham Mitchell did utter:
> 
> http://cs.leander.isd.tenet.edu/~mitchell/vorbis_intro.html
> 

Very cool - I've been wanting a good first point of advocacy for converting
the mp3heads I know. Given enough time I would have written something myself.

Some comments, I don't know if they're appropriate for this document, but
nonetheless...

<p> . The 44.1khz sample rate came about not just because it satisfied the need
 for a sample rate greater than 40khz (why not use a nice, round 48khz then?)
 ...see http://www.jthz.com/mp3/CD-44100Hz.htm for discussion on why 44.1Khz
 was chosen. 
 (this was just a trivial point I thought I'd share :)

 . The 16bit sample size of CD's implies a greater sample size is better.
 (and indeed, 20bit CD's and DVD-audio bear this idea out). Curious then
 that SACD gets away with a 1bit sample size?!
 (This was (is?) one of those areas where I know enough to be dangerous,
 not usefull. It might be worth a note regarding other media using alternate
 sample size/rate values to achieve similar results)

 . Might it be worth noting the lossy/lossless stereo coupling at -q5 ?

 . Tagging is a hot topic of course. Most mp3heads would be familiar with
 the limitations of id3 (even if they wouldn't recognise them as
 "limitations" unless pressed). The advanced possibilities of ogg tagging
 might be worth a note. Even if it's something along the lines of
 "Ogg supports an extensible set of tags so you can keep as much, or as 
 little information about the track as you want. No more limitations of id3"
 (I think mentioning metadata streams is a bit much though ;)

I'm afraid I don't know ABR/VBR enough to help on that bit of the document.

cheers...
.../Nemo

<p>--- >8 ----
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