Removing that volume limit, iPhone 5

Discussion in 'Jailbreaks and iOS Hacks' started by stewlewis, Jan 11, 2015.

  1. stewlewis macrumors newbie

    Joined:
    Jan 10, 2015
    #1
    IOS 8.1.2
    I have a UK Iphone 5
    It has the \settings\music\volume limit\EU volume limit toggle.

    As others have said it's quiet, especially with high ohm non apple headphones.

    I used TaiG to jailbreak.
    I use Ifunbox to copy files to and from PC
    I use plist editor pro under Windows to edit the files.

    I have a SPL/RTA audio prog on the laptop and a jack lead from iphone headphone to laptop.

    Freashly restored IOS 8.1.2:
    Playing white noise mp3 EU volume limit ON and calibrate the RTA software to 85db.

    original:
    //system/library/frameworks/mediatoolbox/framework

    /N42/EUVolumeLimits.plist
    <key>HighVolumeLimit</key>
    <real>0.0</real>
    <key>LowVolumeLimit</key>
    <real>0.63</real>

    /N42/RegionalVolumeLimits.plist
    <key>HighVolumeLimit</key>
    <real>0.90000000000000002</real>

    //system/library/frameworks/mediatoolbox/framework

    /default/EUVolumeLimits.plist
    <key>HighVolumeLimit</key>
    <real>0.83999999999999997</real>
    <key>LowVolumeLimit</key>
    <real>0.59999999999999998</real>

    /default/RegionalVolumeLimits.plist
    <key>HighVolumeLimit</key>
    <real>0.83999999999999997</real>

    Full volume RTA=96db
    EU volume limit on RTA=85db

    editing:
    //system/library/frameworks/mediatoolbox/framework

    /N42/EUVolumeLimits.plist
    <key>HighVolumeLimit</key>
    <real>0.90000000000000002</real>
    <key>LowVolumeLimit</key>
    <real>0.63</real>

    /N42/RegionalVolumeLimits.plist
    <key>HighVolumeLimit</key>
    <real>0.90000000000000002</real>

    //system/library/frameworks/mediatoolbox/framework

    /default/EUVolumeLimits.plist
    <key>HighVolumeLimit</key>
    <real>0.90000000000000002</real>
    <key>LowVolumeLimit</key>
    <real>0.63</real>

    /default/RegionalVolumeLimits.plist
    <key>HighVolumeLimit</key>
    <real>0.90000000000000002</real>

    Full volume RTA=97.5db
    EU volume limit on RTA=85db
    (same files in both locations, default and N42)

    deleting:
    Both files in /default
    Full volume RTA=97.5db
    EU volume limit on RTA=85db


    Changing:
    Values to 1, in all or either files in both or either locations:
    Full volume RTA=97.5db


    Deleting and restoring:
    restore original files to /default
    delete both files from /N42
    Full volume RTA=99db !
    BUT, switching EU Volume Limit toggle crashes/restarts IOS
    Stopping and starting a track causes volume to go to zero, manually turn back up.
    Turn volume of to full gives high volume warning and orange bar, has to be turned up again.

    I did not install Openssh or change any file permissions during this, it didn't seem to matter.

    Anyone know how to get:
    Full Volume to 99db and the EU Toggle switch still work?
    That seems to be the max from the phone, unless anyone knows different?
    Which if any of these files are in place on a US/Non EU phone?
    If they are in place on US phone, contents?
    I have read to restore via VPN from itunes with a US IP, does this work? Does it have any regional impact on cellular etc?


    *the db values are examples, just a reference on laptop.

    Searches bring up lots, yet not much info on the limit removal.
    A lot of old stuff too, the internet's getting full of old crap.
    Archive is good, old crap is misleading.

    Update:

    I followed these instruction from another forum:

    http://www.head-fi.org/t/682937/iphone-5c-and-5s-audio-output/300#post_10413365

    The Full volume limit is now RTA=99db
    With the EU volume limit toggle on the RTA=73db

    Cool, I thought, maybe the EUVolumeLimit.plst number is a percentage of the slider and the top of the slider is now 1.2 as opposed to 1. When toggling the EU Limit the volume slider does indeed jump to about halfway rather then 3/4.

    But, exiting settings and music apps and running them again the limits reverted to as I had them set in the previous post.

    Full=97.5db
    EU=85db
     
  2. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #2
    Wow the European Union has a cellphone volume limit.
    Nonsense...
     
  3. stewlewis thread starter macrumors newbie

    Joined:
    Jan 10, 2015
    #3
    Yep all portable music players supplied with headphones.
    85db by passable with warning, 100db full volume.

    Trouble is that's measured out of supplied earphones, aftermarket earphones with different impedances would output different volumes.

    I think non EU phones and players, iPhone, would give 120db out of the apple buds.

    But, apple can't be blamed for providing a player and earphones that could deafen you cus the EU told them about it..........

    Don't supply the phones, iPad, don't need to comply and limit the device.

    I may be wrong on those dB numbers and my tests for sure as I didn't calibrate properly.

    ----------

    I've now tried using the Filza app and editing the files on the phone, changing permissions too.

    No change to results.
     
  4. stewlewis thread starter macrumors newbie

    Joined:
    Jan 10, 2015
  5. cymolia macrumors 6502a

    Joined:
    Mar 17, 2012
    Location:
    Orange County, FL
    #5
    download the mikoto tweak, there's an option in there to remove it
     

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