[Vorbis-dev] 5.1 surround channel coupling

[Sebastian Olter]

Martin:
> you haven't applied the Furse-Malham
> weightings.
> ...
> The Furse-Malham weightings were a recent
> addition to the ".amb" specification (January 24,
> 2007), so you may have missed it.

Yes, I have definitely to clear my Firefox's cache;) I simply didn't
think about normalization - especially in the context of a lossy
codec. Anyway, an updated version of the function (and patch) is in
attachment. Could you look at these equations again?

I added 3rd order, just for curiosity. 16 channels exceed mplayer's
limits, so a good [GPL'd] Ambisonic decoder library will be useful.
Does anybody know (and better: support) such a library?

AFAIK, the correct way to mix down B-Format into stereo is UHJ. Again:
is there a library to do this?

Patch is to be applied inside the oggenc/ source directory.
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