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  1. #1


    Member Since
    Oct 21, 2006
    Posts
    17
    20" Core 2 Duo Surround Sound?
    I have my new iMac connected to my home surround sound system via optical out and I can achieve a 2 channel signal from my amp. How do I activate the full 5 channel output for use during dvd playback? These are currenty only playing as 2 channel. The amp does display Optical signal is active.

    Many thanks

    Sneeks

  2. #2

    Aptmunich's Avatar
    Member Since
    Mar 09, 2004
    Location
    Munich
    Posts
    9,073
    Specs:
    Aluminium Macbook 2.4 Ghz 4GB RAM, SSD 24" Samsung Display, iPhone 4, iPad 2
    Check under 'applications->utilities->audio/midi setup' and see if you can tell your iMac to use more channels by selecting 'configure speakers-> multichannel -> number of speakers'.

  3. #3


    Member Since
    Oct 21, 2006
    Posts
    17
    Thank you for the advice, unfortunately it looks like the iMac will not support my Sony surround sound amp The options for 5.1 are not selectable.

  4. #4


    Member Since
    Oct 27, 2005
    Posts
    4,702
    Sorry to hear that.....you would have been totally cruising with your 5.1 set-up....

  5. #5


    Member Since
    Oct 21, 2006
    Posts
    17
    The setup I have at home is perfect with all other devices (Xbox 360, dvd player etc) but the iMac does not seem to be able to connect using the full 5.1

  6. #6


    Member Since
    Aug 16, 2006
    Posts
    245
    Interesting... I'll have to double check but I'm using my iMac (Intel, 20" cd) with a Sony surround amp and I'm fairly sure it's doing the full 5.1 output on the optical whenever I use a DVD. I'll take another look tonight...

  7. #7


    Member Since
    Oct 21, 2006
    Posts
    17
    Thanks, I'll be interested to read your results.

  8. #8


    Member Since
    Oct 21, 2006
    Posts
    17
    I discovered the answer on the Mac discussion area. Working perfectly now.

    In the DVD player preferences there is an option that is available ONLY when a Toslink cable is connected to the iMac. Under Disc Setup there is a box for Audio Output that defaults to System Sound Output. When the digital audio cable is connected there will be a second (hidden) option that can be detected if you click on the arrows next to System Sound Output that lets you choose to pass through the actual Surround Sound information from the DVD. So the required sound preference is not in the OS X System Preference->Sound panel at all. And clicking on the preference on an actual DVD movie (as you would with a standalone DVD player) also does not turn on the surround sound.

  9. #9


    Member Since
    Aug 16, 2006
    Posts
    245
    Excellent, I was just about to post to say mine's working but I don't remember that hidden option, perhaps it defaulted to 5.1 for some reason on my system. Good to hear you got it working though

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