Poor Audio Quality

Discussion in 'Apple TV and Home Theater' started by Ant2369, Sep 22, 2017.

  1. Ant2369 macrumors member

    Ant2369

    Joined:
    Jul 20, 2011
    Location:
    Connecticut
    #1
    Set up my new Apple TV 4K. When connecting to my home theater the receiver displays “Multi channel in”. And the sound quality is very poor I tested it on Netflix as well as VUDU. Almost like it’s sending stereo sound over the speakers. If I hit the display on my receiver it says PCM. If I swipe down on the remote the audio output is set to the Apple TV if I change it to the receiver it goes into airplay automatically I lose the picture but the sound quality tremendously improved. I don’t recall ever having this type of issue with my previous Gen Apple TV 4 I have no idea what I’m doing wrong
     
  2. vipergts2207 macrumors 68020

    vipergts2207

    Joined:
    Apr 7, 2009
    Location:
    Columbus, OH
    #2
    How does it sound if you change the audio to Dolby 5.1 on the ATV? Also try messing with the 16-bit audio setting.
     
  3. Ant2369 thread starter macrumors member

    Ant2369

    Joined:
    Jul 20, 2011
    Location:
    Connecticut
    #3
    I tried setting it to 5.1 it sounded a bit better but nothing compared a 4K blu ray or Netflix running on my XBox One S I didn’t try the 16bit audio. I have a brand new Denon X4300 receiver and 7.1 setup of all SVS Speakers so not anything cheap or outdated It was a vey muffled sound watching gun scenes from Deadpool on VUDO there was very muffled no “feel” of the guns firing If that makes sense
     
  4. Ant2369 thread starter macrumors member

    Ant2369

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    Jul 20, 2011
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    Connecticut
    #4
    Anyone else experiencing poorer than expected sound quality
     
  5. Poontaco macrumors regular

    Joined:
    Feb 2, 2014
    #5
    Is your Apple TV connected directly to your receiver, or to the TV first?
    --- Post Merged, Sep 25, 2017 ---
    Also; Is there an option on your receiver to switch between LPCM and bitstream? You probably want bitstream.
     
  6. Ant2369 thread starter macrumors member

    Ant2369

    Joined:
    Jul 20, 2011
    Location:
    Connecticut
    #6
    It’s connected to the receiver directly I didn’t see any options to switch to bitstream but from the tech specs of the Apple TV I don’t think it supposed bitstream
     
  7. Poontaco macrumors regular

    Joined:
    Feb 2, 2014
    #7
    The Apple TV outputs both, but it modifies the signal first (to add menu sound effects). Your receiver may not like what it is getting.
    I think your only options are to play around with the Apple TV's audio out settings and the receivers audio in settings.
     
  8. LtRoyalShrimp macrumors member

    LtRoyalShrimp

    Joined:
    May 21, 2014
    Location:
    SF, CA
    #8
    Yes, noticed the same thing.

    iTunes movies, Netflix, all sound ok when using "highest quality" or whatever the option is.

    However, when watching movies via the Vudu app, the sound is all muffled and distant.

    When I change the Apple TV 4k sound to Dolby Digital 5.1, it sounds normal again. Guess its just an issue with the Vudu app.
     
  9. Ant2369 thread starter macrumors member

    Ant2369

    Joined:
    Jul 20, 2011
    Location:
    Connecticut
    #9
    That’s good to know...What is your set up? I’ll have to try watching something in iTunes. I watched a bit of Narcos on Netflix and it was ok maybe I need something more action to test the Netflix sound. Using the ESPN and Fox Sports app sound was great but it was also in stereo
     
  10. netnothing macrumors 68040

    netnothing

    Joined:
    Mar 13, 2007
    Location:
    NH
    #10
    Vudu app has a known bug with audio when set to Best Quality Available. Will just have to wait until the next update.
     
  11. Ant2369 thread starter macrumors member

    Ant2369

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    Jul 20, 2011
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    Connecticut
    #11
    All great info I was getting nervous I was gonna have to return my ATV 4K and that was one of the releases I was most excited for
     
  12. ErikGrim macrumors 68040

    ErikGrim

    Joined:
    Jun 20, 2003
    Location:
    Brisbane, Australia
    #12
    Yes. I posted about it here.

    I will mess with the settings after work today and see if it makes a difference. Old Apple TV had no such issues.
     
  13. hectorvs macrumors regular

    hectorvs

    Joined:
    Feb 24, 2011
    #13
    audio quality is app dependent... some apps like PS Vue only do stereo :/
     
  14. guitarguy316 macrumors regular

    Joined:
    Sep 5, 2010
    #14
    side question...is "highest quality available" = dolby digital 5.1? meaning it's either DD 5.1 or stereo output? any reason not to just force DD 5.1 instead?


    https://support.apple.com/en-us/HT204069
     
  15. Ant2369 thread starter macrumors member

    Ant2369

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    #15
    Highest available I assume will send whatever the best the app will support 7.1 5.1 or stereo
     
  16. JWort93 macrumors member

    Joined:
    Aug 3, 2013
    #16
    Highest quality available decodes everything and transmits it as uncompressed LPCM audio to your receiver. This allows up to DD+ 7.1 from iTunes files that support it.
     
  17. Poontaco macrumors regular

    Joined:
    Feb 2, 2014
    #17
    And some apps (like Infuse) will let you passthrough a DTS 7.1 signal.
     
  18. Ant2369 thread starter macrumors member

    Ant2369

    Joined:
    Jul 20, 2011
    Location:
    Connecticut
    #18
    I’m very happy to say it is 100% the Vudu app causing the poor audio quality on the Apple TV. Just watched a few scenes from Sicario over my Plex server and the sound was phenomenal
     

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17 September 22, 2017