[vorbis] Multichannel files

[Monty]

On Thu, Nov 15, 2001 at 09:05:01PM +1100, Michael Smith wrote:
> At 10:26 AM 11/15/01 +0100, you wrote:
> >On Thu, 15 Nov 2001 12:46:32 +1100, Michael Smith wrote:
> >
> >>Oggenc will happily encode multi-channel wav files, though it doesn't merge
> >>multiple files for you. 
> >>
> >>However, two caveats:
> >> 1) Decoders. I don't think anyone deals with this right, yet.
> >> 2) Channel mappings - we haven't defined a way to do this, yet. So all you
> >>    have is N independent channels, the file won't say that one is front-
> >>    left, one front-right, one centre, etc. 
> >
> >could you add channel mappings for 
> >
> >a) ambisonics: w-x-y-z channels
> >b) 5.1 surround
> 
> Well, once we have decided on a way to do channel mappings, adding specific
> mappings should be pretty straightforward - but we don't have a defined
> mechanism for definition of these channel mappings. We should probably 
> try to do this some time soon, it'd be nice to have this for 1.0 if we
> can. 
> 
> Monty, where would you see this sort of channel definition fitting into
> the format?

Well, let's see, I need to think about it... ambisonics had been
pushed off a bit, everything else is just 'each channel is PCM'...

Monty

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