[Vorbis] multi channels & documentation

[Yhoudebine at aol.com]

hi
i'm looking for information about the multichannel spec. of vorbis.
1/ the documentation specifies that 256 channels are available ( -c 256)
... it sounds very well but how may i specify the original files ??? (i haven't 256 physical entries on my soundcard ... arffff)
so is there a way to declare something like
oggenc file1.wav file2.wav file3.wav -c3 final.ogg ???

2/ panoramics are predefined (L, center, R, ...).
is there someone who works on a possible way to define % values in the command line (something like oggenc file1.wav file2.wav file3.wav -% 30 50 70 -c3 final.ogg where -% 30 50 70 could be values for the R channel .... or any other better idea)

3/ Documentation about ogg is really well made ... thanx a lot !!!
is there anyone who made one on a same way about vorbis (function definitions, ...) because i must admit i'm a little bit lost with the existing one (maybe because i'm french .... arffffff)

Note that percent values could be set to indicate the L (or R) value of your pan (balance ) for the specified file

i urgently need information. we are trying to adapt ogg vorbis onto a DSP to realize a physical encoder / decoder using multi channels

thanx
yvan