Problem with audio out and mkv files, voices missing

Discussion in 'MacBook Pro' started by helloniklas, Apr 22, 2008.

  1. helloniklas macrumors newbie

    Joined:
    Apr 22, 2008
    #1
    When I play back an mkv video file on my Macbook Pro, it works fine when I use the interbak speakers. Now, if I connect to external amp and speakres with a normal 3.5 mm jack plug, the sound I hear is only the music but not the voice tracks?

    I would have thought the audio out connection would play the same as my internal speakers?

    I tried with both VLC and QuickTime and Perian 1.1 and I run all the latest updates. The auido plays back fine in both players with internal speakers, but with audio-out only the background music plays?

    Any idea?
     
  2. killmoms macrumors 68040

    killmoms

    Joined:
    Jun 23, 2003
    Location:
    Washington, DC
    #2
    I'm assuming that for some reason it's only sending out the L and R channels of a 5.1 audio stream? Usually dialogue is kept almost entirely in the center channel in movies. Check your downmix settings in Perian and make sure it's set correctly.
     
  3. helloniklas thread starter macrumors newbie

    Joined:
    Apr 22, 2008
    #3
    The only setting I can find is the System Preferences for Perian - Audio Output. Which is set to Stereo. I tried other options as well, but same problem.

    Now, is there any other hidden place where things can be set?
     
  4. killmoms macrumors 68040

    killmoms

    Joined:
    Jun 23, 2003
    Location:
    Washington, DC
    #4
    Hmm. It's very odd that it'd happen between the two outputs (internal vs. audio out). Unless you were hooking up via digital and something was getting messed in trying to pass-through the original encoded Dolby Digital, I can't think of why that'd happen.

    What if you plug in, say, a pair of headphones or computer speakers straight into your MBP's audio-out port? I'm wondering if your receiver is mucking things up. Does your receiver support decoding Dolby Pro Logic and outputting that to surround speakers you don't have?
     
  5. helloniklas thread starter macrumors newbie

    Joined:
    Apr 22, 2008
    #5
    hm, yeah, turns out it was the plug going into my amp that was a bit faulty, somehow. I changed that one and it now works fine.

    thanks.
     
  6. jjahshik32 macrumors 603

    Joined:
    Sep 4, 2006
    #6
    Are the mkv files in dts coding instead of aac, ac3, mp3??
     

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