Problem with iOS5 and spdif out

Discussion in 'Apple TV and Home Theater' started by ZouKou, Oct 13, 2011.

  1. ZouKou macrumors newbie

    Joined:
    Mar 9, 2008
    #1
    Hey everyone.
    I just updated my appletv which i was using via airplay to listen to my music library at my hi-fi system. It was connected via SPDIF (optical out) to a Digital to Analog Converter (DAC) and i was able to listen from that.
    After the update to iOS5, i get no sound from from the digital out when it is connected to the DAC. Changed an optical cable, and sound was back but it sounded like it was coming from the abyss and completely digital with a lot of hisses, like listening to low quality internet radio.
    Does anyone have an idea if this can be fixed?
    Thanks
     
  2. iPhisch macrumors 6502

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    Jun 22, 2010
    Location:
    Indiana
    #2
    is you DAC powered? need to be plugged in or batteries changed?
     
  3. ZouKou thread starter macrumors newbie

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    Mar 9, 2008
    #3
    The DAC is powered yes and is working fine, as I connected both my macmini and MacBook pro via optical and all was ok...
     
  4. iPhisch macrumors 6502

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    Jun 22, 2010
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    Indiana
    #4
    weird. maybe try a restore install? maybe there is a setting that got turned off by default in the new OS?
     
  5. hualon macrumors 6502

    Joined:
    Feb 5, 2008
    #5
    I experienced the exact same problem on all three of my ATV2s with the update that I installed yesterday. I am running two of them headless and (optical audio only, no HDMI) into DACs. All I get is hissing and pops too.

    ZouKou, have you tried fiddling with the Dolby Digital setting? As soon as I can connect a tv to the headless units I'm going to try that and see if there's anything else in the menus that looks like a culprit.
     
  6. ZouKou, Oct 16, 2011
    Last edited: Oct 16, 2011

    ZouKou thread starter macrumors newbie

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    Mar 9, 2008
    #6
    Hualon I m using it in the exact same way as you do.
    I ve played with the dolby settings and the sound settings in case that was the problem but nothing came out.
    This whole thing seems to be working with the ATV2 connected to a monitor via hdmi and to the DAC via SPDIF and i boot it with both connections active. If the HDMI is not active, the thing doesn't work. If i pull the HDMI while the setup is working it continues to work.
    If i start the ATV2 without an HDMI cable plugged and I plug it after it boots, nothing comes on the display.
    So for the time being i m using a silly 10m spdif cable running in the apartment and the ATV2 is connected on my monitor in the other room where the mac mini is
     
  7. JeffLebowski41 macrumors regular

    Joined:
    Jul 28, 2010
    #7
    My appletv2 is connected to a vizio soundbar via optical, and no longer plays dolby digital after the update. Not sure what the deal is. Worked before and no changes were made to the setup, besides updating the appletv software.
     
  8. ZouKou thread starter macrumors newbie

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    Mar 9, 2008
    #8
    The update that came out, fixed just the movies section that wasn't appearing on the ATF after the new iOS. The problem with the sound via spdif still stands.
    I hope I can find an older atv to buy around...
     
  9. wirawee macrumors member

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    Oct 2, 2011
    Location:
    San Francisco, CA
    #9
    Same deal for me. I don't have a dedicated DAC, I just go straight from my optical out to my B&W amp/speakers. All I hear is lots of loud popping sounds. I went into the ATV settings and turned off Dolby Digital (former setting was Auto). That seems to have fixed the problem, though I assume it's only providing a stereo signal now.
     
  10. ZouKou thread starter macrumors newbie

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    Mar 9, 2008
    #10
    @Wirawee
    Does your amplifier put a flag on its display regarding the signal its getting from the ATV? For example 16bit 44KHz or something similar to that?
     
  11. iPhisch macrumors 6502

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    Jun 22, 2010
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    Indiana
    #11
    Have you guys tried starting a thread on the Apple Discussions board? If this is a software issue, the more people Apple knows are having the problem, the sooner it will get fixed.
     
  12. wirawee macrumors member

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    Oct 2, 2011
    Location:
    San Francisco, CA
    #12
    Good question. No, it's a pretty simple amp/speaker combo and doesn't give me a lot of feedback.

    I switched the Dolby Digital setting from "Auto" to "On" last night and I no longer was getting the popping sounds. I will test again tonight and post my results.
     
  13. ZouKou thread starter macrumors newbie

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    Mar 9, 2008
    #13

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