I might fix _sound_library.emitWorld_ too later on, but that requires me to use http://wiki.garrysmod.com/page/Global/EmitSound to play the sound, as _WorldSound_ is now deprecated. 

However, the problem is that the _soundFlags_ argument used in _Global/EmitSound_ is badly documented, and I might have to change the arguments for _sound_library.emitWorld_ to somewhat match the arguments used in _Global/EmitSound_.
Another possible fix is just to remove _sound_library.emitWorld_.

I will not commit a fix on this issue until further approvement.