Ok, I've got my entity hooked up with a hurt sound like this:

protected String getHurtSound() {
	return ReferenceRF.RES_PRE + "mob.mummy.hurt";
}

 

And whenever I hit my entity, this pops up in the console:

[19:55:49] [Client thread/WARN]: Unable to play empty soundEvent: realmoffera:mob.mummy.hurt

 

Here's what my json looks like:

{
"mob.mummy.say": {
	"category": "hostile",
	"sounds":
	[{
		"name": "mob/mummy/say", "stream": false
	}]
},
"mob.mummy.death": {
	"category": "hostile",
	"sounds":
	[{
		"name": "mob/mummy/death", "stream": false
	}]
},
"mob.mummy.hurt": {
	"category": "hostile",
	"sounds":
	[{
		"name": "mob/mummy/hurt", "stream": false
	}]
}
}

 

Finally here's my file tree:

 

I'm 100% sure that my sounds are in the .ogg format.

What was the solution?  I have an almost identical issue.  I'm using latest Forge (.1047) and am getting an "unable to play soundEvent" error.  I have assets folder path that I have double checked (and yes it uses the plural "sounds" not "sound").  My sounds.json is pretty much just copied from the wolf portion of the vanilla sounds.json and the sounds themselves are copied from wolf as well so are valid .ogg files.  (I'll change to my own later, just using wolf to debug this issue). 

 

So what was solution in your case?  Thanks!

I had some misspelled folder names, that was about it.