[vorbis] Multi-track vorbis files

[rillian at telus.net]

On Monday, April 23, 2001, at 03:02 , Nathaniel wrote:

> How would I go about creating a vorbis file with more than two tracks?  
> How
> difficult would it be to create, say, a file that had a left, right and 
> bass
> track?  Or even a vorbis file that had all the tracks available in an 
> ac3
> file?

vorbis currently compresses each channel independently, and can handle 
arb. numbers of channels, I believe. Certainly some tests have been done 
with four channel audio. You should be able to access this just by 
handing the encoder a multi-track .wav file. Or if you're writing your 
own software, just set the proper number of channels and take care of 
interleaving the samples.

There's no real way to say what channel is what right now. We've talked 
about surround formats in the past, and there's a general plan to 
support them and a way of identifying things, but they're both looking a 
ways off unless someone (you?) comes forward to work on a 
design/implementation.

Hope that's helpful,
  -ralph

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