Greetings! I have noticed this bug that have been occurring for quite some time and was wondering if you guys knew about it / are able to fix it! So currently when I launch Minecraft on my computer, it works fine and great and all, but when I launch Minecraft when/after I have applications like Discord/TeamSpeak open, the sounds on Minecraft seem to not work - the game is completly silent and is not sending out any source of audio. I can go into my Minecraft settings and see that the Sound Settings are perfectly normal of where I left them but the sounds are still not there. With this bug, I can simply use the debug tool to reload the texture pack "F3+T" and it fixes this issue, but it can get somewhat a little annoying/confusing too for some users who have no idea about fixing this.
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This sounds like a tech support issue:
but when I launch Minecraft when/after I have applications like Discord/TeamSpeak open
But let's give it a try.
After having this issue: Please attach the complete output of the "Game Output (Your Minecraft name) " which can be found on the fourth tab of the launcher to this ticket.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".

Heres the Game Output 🙂

Completely ignored arguments: [--nativeLauncherVersion, 307]
[14:50:21] [Client thread/INFO]: Setting user: Exemption
[14:50:22] [Client thread/INFO]: LWJGL Version: 2.9.4
[14:50:23] [Client thread/INFO]: Reloading ResourceManager: Default, Default Improved
[0810/145023:ERROR:browser_gpu_channel_host_factory.cc(119)] Failed to launch GPU process.
[0810/145023:ERROR:browser_gpu_channel_host_factory.cc(119)] Failed to launch GPU process.
[14:50:23] [Sound Library Loader/INFO]: Starting up SoundSystem...
[14:50:24] [Thread-5/INFO]: Initializing LWJGL OpenAL
[14:50:24] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80004005
AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80004005
[14:50:24] [Thread-5/ERROR]: Error in class 'LibraryLWJGLOpenAL'
[14:50:24] [Thread-5/ERROR]: Unable to initialize OpenAL. Probable cause: OpenAL not supported.
[14:50:24] [Thread-5/WARN]: ERROR MESSAGE:
[14:50:24] [Thread-5/INFO]: Could not locate OpenAL library.
[14:50:24] [Thread-5/WARN]: STACK TRACE:
[14:50:24] [Thread-5/INFO]: org.lwjgl.openal.AL.create(AL.java:156)
[14:50:24] [Thread-5/INFO]: org.lwjgl.openal.AL.create(AL.java:102)
[14:50:24] [Thread-5/INFO]: org.lwjgl.openal.AL.create(AL.java:206)
[14:50:24] [Thread-5/INFO]: paulscode.sound.libraries.LibraryLWJGLOpenAL.init(LibraryLWJGLOpenAL.java:164)
[14:50:24] [Thread-5/INFO]: paulscode.sound.SoundSystem.CommandNewLibrary(SoundSystem.java:1576)
[14:50:24] [Thread-5/INFO]: paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2572)
[14:50:24] [Thread-5/INFO]: paulscode.sound.CommandThread.run(CommandThread.java:121)
[14:50:24] [Sound Library Loader/WARN]: ERROR MESSAGE:
[14:50:24] [Sound Library Loader/INFO]: Could not locate OpenAL library.
[14:50:24] [Sound Library Loader/INFO]: Starting up SoundSystem...
[14:50:24] [Thread-7/INFO]: Switching to No Sound
[14:50:24] [Thread-7/INFO]: (Silent Mode)
[14:50:24] [Sound Library Loader/INFO]: Sound engine started
[14:50:25] [Client thread/INFO]: Created: 2048x2048 textures-atlas