I am unable to get sound to work in the current version of Minecraft. When the game loads the client gives "Exception in thread "Thread-6" org.lwjgl.openal.OpenALException: Invalid Device" and when I try F3 + S the client gives "Exception in thread "Thread-10" java.lang.IllegalStateException: Only one OpenAL context may be instantiated at any one time.". I attached the client log as well.
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I found a fix that works for me. In the sound panel right click on your device and click "Configure Speakers". I had to change my device from "Surround" to "5.1 Surround".