I noticed that special alert 2 which I have set to C'Thun: You Will Die! is not playing any sound. In the options all other alerts play when I select them except for this one. I updated to the lastest release r174 and the same thing is happening. I've also gone all the way back to r136 and I still don't hear it. I definitely remember it working about a month ago, so I don't know how that's possible. I've disabled all other addons and still no luck.

def hasn't been changed by us but maybe classic isn't using a diff sound path from retail anymore? i assume this is on classic?

Sorry, this is on retail. I should have clarified. I have since realized the sound is completely gone from my game. I used another addon to try and play the sound file and it couldn't play it either

It genuinely seems blizzard secretly deleted this sound file from game. it just simply doesn't exist anymore. So I'm just removing the option from DBM entirely