multiple files to multichannel ogg vorbis? Options

[herg]

I am trying to merge multiple stereo ogg vorbis files into a single multichannel ogg vorbis file using only command line Linux tools.

From what I understand, oggenc requires a multichannel input. I have used sox -M to create a multichannel wave file, but oggenc doesn't like it:

CODE

Warning: INVALID format chunk in wav header.
Trying to read anyway (may not work)...
Skipping chunk of type "fact", length 4
ERROR: Wav file is unsupported type (must be standard PCM
or type 3 floating point PCM)
ERROR: Input file "combined_newsox.wav" is not a supported format

Audacity will read it fine, however.

Using sox to create the multichannel ogg, the output sounds horrible.

Any suggestions?