What is Ac3-Passthrough?

Discussion in 'Apple TV and Home Theater' started by suss2it, Aug 24, 2010.

  1. macrumors regular

    Sep 9, 2009
    What exactly does AC3 Passthrough do? And what are the benefits of it? And is it possible to tell if a file that has an AAC track and an Ac3 if the Ac3 one is passthrough?
  2. macrumors 68030

    May 27, 2008
    it passes the digital stream through without touching it. If you've got a stereo capable of handling the raw stream, you'll get surround sound.

    if you play the file in VLC or quicktime, hit CMD-i, you can see what kind of audio it has.
  3. macrumors 68020

    Mar 27, 2003
    Well, if your talking about the appletv .. it can *only* pass through an ac3 track ... and only if your hooked up to an Ac3 capable receiver or tv. Otherwise it will play back the 2 channel aac track. If hooked up properly to an ac3 capable receiver your receiver should indicate the sound being used.

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