Comment 6 for bug 472687

I can confirm this is an openal bug; specifically it has to do with openal and pulsaudio.
Interestingly, when in this 100% cpu, changing blender's soundsystem to sdl or none causes blender to hang, but 'killall pulseaudio' at the commandline makes this go. I've been told the recent version of openal 1.10 is working better with pulse and should fix this bug.