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  1. Member
    Join Date
    May 2001
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    Search Comp PM
    I have some laserdiscs that have a multichannel AC3 (well, Dolby Surround is the official name) audio track on them. I am assuming that there is more than 2 channels present, which is all my sound card can handle.

    What audio cards do you guys use to capture these multiple channels?
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  2. Member
    Join Date
    Dec 2002
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    United States
    Search Comp PM
    Wrong Assumption. Dolby Surround sound has 2 real channels. Does your LD player have 6 RCA connectors for Audio?

    It's actually a MUX of 4 channels. You get Left, Right, Center and Rear. It's not tru 4 channel, that is you don't have 4 distincitve full audio tracks going at once. It's better than stereo but not nearly as good as AC5.1 .
    To Be, Or, Not To Be, That, Is The Gazorgan Plan
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  3. Member
    Join Date
    May 2001
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    Search Comp PM
    According to the literature, this disc was released with both PCM and AC3 5.1 audio. The player itself has only the two audio out jacks, plus the AC3 RF output jack. The output from this AC3 jack is fed into your A/V receiver with an AC3 demodulator. It is split into its separate channels in the demodulator. If I have these six channels, what do I use to cap them - simultaneously?
    ICBM target coordinates:
    26° 14' 10.16"N -- 80° 16' 0.91"W
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  4. first, you need special hardware to even try and record a RF AC-3 signal directly. the best bet is to use line-level signals of the decoded 5.1 mix, such as pre-amp outputs from your receiver, or use a line-level tap from your speaker outputs (NOTE: DO NOT CONNECT SPEAKER LEVEL OUTPUTS DIRECTLY TO A SOUND CARD INPUT)

    i think it'd be possible to record 3 simultaneous stereo WAV files, provided you had one or more sound cards totaling 3 stereo input channels. (usually this would be 3 cards). open 3 cool edits and set them all to record. you would need to delete some silence off the beginning to sync them up, but there's a trick for that - start playing the movie, then after sound starts, go back one track - so there's a sharp cut in the wav files. that'll help line them up.
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