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03-12-2003, 06:09 AM
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Join Date: Dec 2002
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The toolame maintener has started a new project : mctoolame 
Quote:
Multi-channel files may have up to 6 defined channels: Left(L), Right(R), Centre(C), Left Surround (LS), Right Surround (RS) and a Low Frequency Enhancement channel (LFE).
ISO13818 defines 5 multichannel modes (on top of the normal stereo mode), each of these modes may have an optional LFE channel:
3/2: L, R, C, LS, RS
3/1: L, R, C, mono surround
2/2: L, R, LS, RS
2/1: L, R, mono surround
3/0: L, R, C
The "standard" surround sound encoding of "5.1 channels" is achieved by using mode 3/2 plus an LFE channel.
A multi-channel mpeg file should decode OK on any mpeg decoder. If the decoder doesn't recognise the multi-channel extensions, then you'll just get a stereo file containing a downmix of the 5 channels. 
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