Understanding Multi-channel Audio DVDs can be recorded with multi-channel audio, using AC3 in the following configurations: 1. One mono channel. 2. Two channels, usually recorded in stereo. 3. Two front channels and one mono surround channel. 4. Two front channels and two surround channels. 5. Three front channels (Left, Center, Right). 6. Three front channels and one surround channel (Left, Center, Right, Rear). 7. Three front channels and two surround channels (Left, Center, Right, Left-rear, Right-rear). An optional Low Frequency Effects channel can be added to each one of these configurations. When DVDxDV extracts these audio channels to separate sound files, it appends the following letters to the file name. M - (mono channel) This is used for sound tracks that contain only one channel. L - (left channel) When there are two or more front channels, this letter is used to indicate the left audio channel sound file. R - (right channel) When there are two or more front channels, this letter is used to indicate the right audio channel sound file. C - (center channel) When three front channels are present, this letter indicates the file that contains the center channel. S - (mono surround channel) When only one rear audio channel is present, this letter indicates the file that contains the surround sound audio. Rr - (right rear) When two surround sound channels are present, these letters indicates the file that contains the right surround sound channel. Lr - (left rear) When two surround channels are included, these letters indicates the file that contains the left surround sound information. lfe - (low frequency effects) In any multi-channel audio sound track, a low frequency effects channel can exist. These letters indicate the file that contains sound for this channel. Example: When extracting audio for an AC3 sound track that contains three front channels, two rear channels and a low frequency effects channel, the file names will be the following: myOutput.L.aiff (left front) myOutput.C.aiff (center front) myOutput.R.aiff (right rear) myOutput.Lr.aiff (left rear) myOutput.Rr.aiff (right rear) myOutput.lfe.aiff (low frequency effects)
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