you do know that pulling the trigger at diffrent times might sync the MGs and sometimes un sync them THATS WHY IT SOUNDS DIFFRENT
Go listen to your sounds between each shot then, also, get into say a 110 and put one barrel in a non firing position and fire the other as I said in my previous post then switch to the other barrel. You'll find they are two different sound files (or at least on my system they are). Then go try this with the 20mm nose cannon from a 38 or a 109 after you open up with the 110 and her 20's and 30mm. I have multiple sound files for both in each folder. At least with my sound pack they do. Maybe the basic one doesn't, I don't know.
You may be right in that also it oddly syncs them, but I double checked with the 110 and visually with a few others, because if it looks like a sheep and sounds like sheep... I welcome you to go test this for yourself.
As I've said there is no sound for a damaged engine shutting off. Say you're RTB with an oil leak. (alone, not being shot at) Your engine dies. It should make a distinguishably different sound than a healthy engine.
As a matter of fact, some planes don't even make a sound when the engine shuts down, while in flight. You have to wait until you're at a complete stop on the runway for the sound to play.
Not sure what planes are like this. That sounds like a bug maybe? As for the damage, it's a mixture depending on the plane. It sounds very similar to the sound my plane makes when I belly land and my prop hits the runway or water. Loud BANG and no engine shutdown except for a bomber. I only checked the 17's tho.
Am I to understand you want an independent sound file for the damaged engine shut down? If that's the case, sorry that I missunderstood.