I was just playing and after around 5 minutes the sounds just went off. I restarted, but it did the same, worked for a bit then stopped,
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Please provide the console output.

I have same bug it seem so it isn't only corrupted file
Seems to be caused by sound/hal2.ogg and playing it

There is console output

Console output from MC-16152.

Can confirm after putting a disc into a jukebox:
Client> Error in class 'CodecJOrbis'
Client> Unable to acquire inputstream in method 'initialize'.
Client> ERROR MESSAGE:
Client> minecraft:sound/cat.ogg
Client> STACK TRACE:
Client> bhp.a(SourceFile:37)
Client> bhx.a(SourceFile:34)
Client> bhx.a(SourceFile:27)
Client> biz.getInputStream(SourceFile:65)
Client> paulscode.sound.codecs.CodecJOrbis.initialize(CodecJOrbis.java:281)
Client> paulscode.sound.libraries.SourceLWJGLOpenAL.play(SourceLWJGLOpenAL.java:616)
Client> paulscode.sound.Library.play(Library.java:706)
Client> paulscode.sound.Library.play(Library.java:675)
Client> paulscode.sound.SoundSystem.CommandPlay(SoundSystem.java:2076)
Client> paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2599)
Client> paulscode.sound.CommandThread.run(CommandThread.java:121)
Client> Error in class 'SourceLWJGL OpenAL'
Client> Audio Format null in method 'play'

I was playing for a minute when my sound cut off. I logged out and back in and still no sound. And running is like walking speed.

Yep, no sounds after playing some minutes.

Same here. Voted up this issue.

Mine crashed on minecraft:sound/piano3.ogg so not just a problem on hal2.ogg - voted up.

Google search similar issue with Paulscode: http://www.paulscode.com/forum/index.php?topic=980.0

Played again 20 mins with music option turned off (sounds on) and no crash.

defiantly being caused by the music, something is rotten in the OggVorbis Library.

Same here. Mojang, please fix this!

Here's the report from my client. The issue occurred with piano3.ogg as well as calm3.ogg for me. It's probably safe to assume that this is caused by all music.The issue is repetitive and is fixed only by re-launching the game. The error can be prevented by turning the game's music volume off. This error does not crash my game, it only stops all sounds. I'll make a new comment if anything new arises.

Added comment: unable to reproduce the lost sound effects when playing a jukebox/music CD; however, I do confirm the same error message occurs. In order to reproduce the complete loss of sound, you have to wait until in-game music plays.

I'm also experiencing this bug. Sound just stops entirely after about 5-10 minutes. I have to restart the client to get it back.
edit: error reports from client:
Client> Error in class 'CodecJOrbis'
Client> Unable to acquire inputstream in method 'initialize'.
Client> ERROR MESSAGE:
Client> minecraft:sound/hal3.ogg
Client> STACK TRACE:
Client> bhp.a(SourceFile:37)
Client> bhx.a(SourceFile:34)
Client> bhx.a(SourceFile:27)
Client> biz.getInputStream(SourceFile:65)
Client> paulscode.sound.codecs.CodecJOrbis.initialize(CodecJOrbis.java:281)
Client> paulscode.sound.libraries.SourceLWJGLOpenAL.play(SourceLWJGLOpenAL.java:616)
Client> paulscode.sound.Library.play(Library.java:706)
Client> paulscode.sound.libraries.LibraryLWJGLOpenAL.quickPlay(LibraryLWJGLOpenAL.java:795)
Client> paulscode.sound.SoundSystem.CommandQuickPlay(SoundSystem.java:1866)
Client> paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2438)
Client> paulscode.sound.CommandThread.run(CommandThread.java:121)
Client> Error in class 'SourceLWJGL OpenAL'
Client> Audio Format null in method 'play'
Client> Exception in thread "Thread-6" java.lang.NullPointerException
Client> at com.jcraft.jorbis.Block.<init>(Block.java:55)
Client> at paulscode.sound.codecs.CodecJOrbis.initialize(CodecJOrbis.java:252)
Client> at paulscode.sound.libraries.SourceLWJGLOpenAL.play(SourceLWJGLOpenAL.java:616)
Client> at paulscode.sound.Library.play(Library.java:706)
Client> at paulscode.sound.Library.play(Library.java:675)
Client> at paulscode.sound.SoundSystem.CommandPlay(SoundSystem.java:2076)
Client> at paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2599)
Client> at paulscode.sound.CommandThread.run(CommandThread.java:121)
Client> 2013-05-23 14:41:24 [CLIENT] [SEVERE] Reached end of stream for /66.85.155.86
Client> 2013-05-23 14:41:26 [CLIENT] [INFO] Stopping!
Client>
Client> SoundSystem shutting down...
Client> Error in class 'SoundSystem'
Client> Command thread did not die!
Client> Ignoring errors... continuing clean-up.
Client> Error in class 'SoundSystem'
Client> Problem during Library.cleanup()!
Client> Ignoring errors... continuing clean-up.
Client> Author: Paul Lamb, www.paulscode.com

I can confirm that this issue is happening on my end also. Just recently upgraded to snapshot 13w21a.

Yes, this does happen. Notice how if this happens it says that:
Client> Error in class 'SourceLWJGL OpenAL'
Client> Audio Format null in method 'play'
Client> Exception in thread "Thread-6" java.lang.NullPointerException
I guess whenever when Minecraft tries to play a backround sound, it cannot "play" due to a "Audio Format null".

In addition notice that it says:
Client> Problem during Library.cleanup()!
It also happens if you try to play a music disk.

I'm also experiencing this issue but only in the Nether on Creative mode. It also appears Ive got the same message from the DevCon:
Client> SoundSystem shutting down...
Client> Error in class 'SoundSystem'
Client> Command thread did not die!
Client> Ignoring errors... continuing clean-up.
Client> Error in class 'SoundSystem'
Client> Problem during Library.cleanup()!
Client> Ignoring errors... continuing clean-up.
Client> Author: Paul Lamb, www.paulscode.com
Client>
Client> AL lib: (EE) alc_cleanup: 1 device not closed
Game ended with no troubles detected (exit code 0)
System info:
Mac OS X 10.7
Java 6_45

Happened to me too.

Here is a little more detail from the console:
Client> Error in class 'CodecJOrbis'
Client> Unable to acquire inputstream in method 'initialize'.
Client> ERROR MESSAGE:
Client> minecraft:sound/calm1.ogg
Client> STACK TRACE:
Client> bhp.a(SourceFile:37)
Client> bhx.a(SourceFile:34)
Client> bhx.a(SourceFile:27)
Client> biz.getInputStream(SourceFile:65)
Client> paulscode.sound.codecs.CodecJOrbis.initialize(CodecJOrbis.java:281)
Client> paulscode.sound.libraries.SourceLWJGLOpenAL.play(SourceLWJGLOpenAL.java:616)
Client> paulscode.sound.Library.play(Library.java:706)
Client> paulscode.sound.libraries.LibraryLWJGLOpenAL.quickPlay(LibraryLWJGLOpenAL.java:795)
Client> paulscode.sound.SoundSystem.CommandQuickPlay(SoundSystem.java:1866)
Client> paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2438)
Client> paulscode.sound.CommandThread.run(CommandThread.java:121)
Client> Error in class 'SourceLWJGL OpenAL'
Client> Audio Format null in method 'play'
Client> Exception in thread "Thread-6" java.lang.NullPointerException
Client> at com.jcraft.jorbis.Block.<init>(Block.java:55)
Client> at paulscode.sound.codecs.CodecJOrbis.initialize(CodecJOrbis.java:252)
Client> at paulscode.sound.libraries.SourceLWJGLOpenAL.play(SourceLWJGLOpenAL.java:616)
Client> at paulscode.sound.Library.play(Library.java:706)
Client> at paulscode.sound.Library.play(Library.java:675)
Client> at paulscode.sound.SoundSystem.CommandPlay(SoundSystem.java:2076)
Client> at paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2599)
Client> at paulscode.sound.CommandThread.run(CommandThread.java:121)

same issue with me
Client>
Client> SoundSystem shutting down...
Client> Error in class 'SoundSystem'
Client> Command thread did not die!
Client> Ignoring errors... continuing clean-up.
Client> Error in class 'SoundSystem'
Client> Problem during Library.cleanup()!
Client> Ignoring errors... continuing clean-up.
Also, I don't know if this has anything to do with the sound issue but every time I use the launcher it says it is going to download 13w21a but it never does.
If I can supply any additional information, please don't hesitate to ask!

Can confirm: http://i.imgur.com/MLNKjOcs.jpg
I'm no coder, but it seems MC's sound engine is "losing track" of sounds, until it completely gives up trying to keep track, and dies.
Fixed 🙂

Also by starting up MC sometimes in all other versions from 1.5.2 and higher doesnt the sound come up. By restarting the game it does. And when does horses get sounds? They are anoying without a bit :/

I am still getting this bug on Mac 😞

I have this bug as well (MacBook).
Text file uploaded: "Sound Bug Minecraft 13w21a.txt"
Thanks for your good work at Mojang... =)

Its not fixed, it just says "Fixed= Future Version 1.6" Make a 'b' snapshot mojang!

Same problem...

Same happening to me! 😞

I understand that the fix will be in a future version, however I played for nearly 3 hours this morning without any sound issues (13w21a). I did turn "Music" to "Off" during gameplay so that may or may not have affected it; sounds still worked after 3 hours.

Client>
Client> SoundSystem shutting down...
Client> Error in class 'SoundSystem'
Client> Command thread did not die!
Client> Ignoring errors... continuing clean-up.
Client> Error in class 'SoundSystem'
Client> Problem during Library.cleanup()!
Client> Ignoring errors... continuing clean-up.
Client> Author: Paul Lamb, www.paulscode.com
Sound did cut out for me also after 3-5 minutes

it's annoying it cuts out 10sec-10min 😞

@Shawn Cheever
That is the current workaround. The sound corruption occurs when random music attempts to play. Turn off the music and everything else keeps playing just fine.

Ok guys, the sound "breaks" when music tries to play, weather it is natural, or is a music disk. The only way to avoid the problem is bu turning the music off. the "sound" slider does not need to be turned off, as far as I know. I'd like my inbox to be only filled if someone has more info or if edits need to be made. I don't like sorting through 12 emails in the morning on the stuff we already know. I'd really appreciate it.

Can confirm all of this

Workaround:
Copy or link all *.ogg files from the assets/music directory into the assets/sound directory.
The directory contains a warning that it will be cleared during updates. If the next update
fixes the bug, that shouldn't be a problem.

@Henk Langeveld Thanks for that workaround!

Confirming this as well. Though my Audio drivers are beyond messed up so I'm not the best source to confirm

Re open please! In 1.8.8 the jukebox no sounds.

Still a problem in 1.13 pre-release. (mac Version) – Once the sound crashes, landing screen gets very laggy.