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Hello, I've read http://xiph.org/ogg/vorbis/doc/stereo.html and the Vorbis specs, but I haven't got a clear concept of how does the Square Polar Mapping works. I mean, in the "Ogg Vorbbis stereo-specific channel coupling discussion" document, it's described how the decoupling process works for Square Polar Mapping (and it is fairly clear explained), but it does not describe how the coupling process works. I've found another thread of May 2003 asking the same question b...