Only get 5.1 through Optical?

Discussion in 'Apple TV and Home Theater' started by KettyKrueger, Aug 7, 2008.

  1. KettyKrueger macrumors 6502

    KettyKrueger

    Joined:
    Feb 17, 2007
    Location:
    UK
    #1
    Hi all

    Just bought an Apple TV. I can't seem to get 5.1 through HDMI, is that normal???

    I'm running it through a Sony SG910 receiver and the blue light indicating that the receiver is receiving muliple channles of audio only lights up when I use an optical connections, is that normal?

    Thanks. :)
     
  2. dynaflash macrumors 68020

    Joined:
    Mar 27, 2003
    #2
    no clue. not familiar with that receiver. my hdmi works fine going through my tv then optical from there to receiver.
     
  3. Killyp macrumors 68040

    Killyp

    Joined:
    Jun 14, 2006
    #3
    Not sure, I don't have anything with HDMI, but at a guess, it may be dependent on whether you're playing material with Dolby Digital/DTS encoded in it, such as a movie...
     
  4. dbwie macrumors 6502

    Joined:
    Jun 11, 2007
    Location:
    Albuquerque, NM, USA
    #4
    I think...

    HDMI carries 2 channels of audio, in addition to the video signal.
     
  5. torid110 macrumors regular

    Joined:
    Jan 22, 2006
    Location:
    Jersey City, NJ
    #5

    That is incorrect. HDMI should be able to handle at least 8 channels of audio. I have many components that i use HDMI only for connections and i get dolby digital/DTS audio. It should work, but alas, i can't test since i'm using optical for the :apple:TV . It could be that the material you are playing is not encoded for 5.1 surround.
     
  6. Xircom macrumors newbie

    Xircom

    Joined:
    Aug 13, 2004
    Location:
    Tokyo, Japan
    #6
    exactly, am using HDMI and is does play 5.1 ... but you have to encode it like this, and also the destination of course has got to support it...
     
  7. KettyKrueger thread starter macrumors 6502

    KettyKrueger

    Joined:
    Feb 17, 2007
    Location:
    UK
    #7
    The files are definitely 5.1. As I said, works fine with optical but not with HDMI.

    It's no biggy really, I was just curious why!
     
  8. dbwie macrumors 6502

    Joined:
    Jun 11, 2007
    Location:
    Albuquerque, NM, USA
    #8
    check the specs

    The specs for the HDMI input on my Sony HDTV say "two channel linear PCM 32, 44.1 and 48 kHz, 16 bits".
     
  9. kolax macrumors G3

    kolax

    Joined:
    Mar 20, 2007
    #9
    I always use optical - I get a bit weary when I daisy chain things up. My A/V receiver has component in and out, so I could have my video pass through it, but I find it a lot neater to keep it simple.

    Yes, that is because your Sony TV has only two output channels!
     
  10. dbwie macrumors 6502

    Joined:
    Jun 11, 2007
    Location:
    Albuquerque, NM, USA
    #10
    and...

    My Sony HDTV also has an optical out. I get 5.1 by connecting the audio source directly to my A/V receiver optical inputs (bypassing the TV). My receiver is a bit older and does not have HDMI ports.
     

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