7.1 audio for iMac

Discussion in 'iMac' started by apenaroks, Aug 6, 2008.

  1. apenaroks macrumors member

    Jun 21, 2008
    Is there any way I can get complete 5.1 audio on my Aluminum iMac? Not just the cheesy adapter that simply gives the same sound to all the sound, i mean TRUE 5.1 audio. Any external Sound modules that can do that?
  2. Cave Man macrumors 604

    Cave Man

    Your iMac will already do 5.1 (or 7.1 as your title says). You simply need content that's encoded in DD or DTS and an amplifier that accepts an optical cable.
  3. shinryu744 macrumors newbie

    Jan 20, 2008
  4. apenaroks thread starter macrumors member

    Jun 21, 2008
    DD or DTS? what is that? And isnt optical the plug that uses light through a fiber optic cable? Mac's dont have the fiber optic technology in them. ???! can you elaborate?
  5. Superman07 macrumors 6502a

    Aug 28, 2007
    They are audio standards for encoding that give different sound to each of the channels. If you have something configured to two channels (stereo or 2.0) then you'd definitely have a "fake" 5.1 even if you had it hooked up to a 5.1/6.1/7.1 speaker setup.

    This would probably be a good starting point for your to read up on: http://en.wikipedia.org/wiki/Surround_sound

    Also, from the Apple website:

    -- Headphone/optical digital audio output (minijack)

    Somebody should be able to post a link to the accessory needed (I couldn't find it with a quick search).
  6. Cave Man macrumors 604

    Cave Man

    Dolby Digital and DTS - the two most common forms of multi-channel digital audio. Most movies today are encoded in digital surround (e.g., 5.1, 7.1, 9.1, etc.) and the way these are stored on DVDs or movie files is using either Dolby Digital or DTS technologies.

    Yes, all Macs sold today have optical audio input and output. The mini-jack is dual-purpose. If you plug in a 1/8" connector, it sends out analog audio. If you plug in a Toslink cable with a miniplug, it sends out optical audio. If you have a receiver or amp that can take optical, then you can get digital audio from your Mac. Analog can only carry Dolby Pro Logic II (5-channel) at this time. Have a look here for the details.
  7. apenaroks thread starter macrumors member

    Jun 21, 2008
    so, my iMac can send out those lights through a toslink miniplug, aka, fiber optics?
  8. Cave Man macrumors 604

    Cave Man

    Yes, provided the media you're playing has a DD track (or DTS for DVDs or movies played by VLC or XBMC, but NOT Quicktime). I have two Onkyo 5.1 systems for our home theater (Mac Mini-based) and family room 40" Samsung (Apple TV). Both play movies in Dolby Digital 5.1 surround - and they rock!
  9. Lord Zedd macrumors 6502a

    Lord Zedd

    Oct 24, 2007
    Denver, Colorado
    Movies and specially encoded videos are the only things that will play in 5.1.

Share This Page