Thanks to "Quaggles" we found out that the Mirage Gun Sound files are located in the following path.
\DCS World\CoreMods\aircraft\SA342\Sounds\Effects\Weapons
Any reason to why is this defined like this?
It's really odd
Edit:
This is some weird shit mate ...
The PlaneCannon.ogg sounds have weird direction specified in sdf
direction = {0, 0, 1}
This makes it look as if its coming from the right ... also the file in Automatic folder makes weird "pop" noises every 3 sec if you hold the trigger.
I changed the direction so it goes forwards not to the right
direction = {1, 0, 0}
I muted the Sound that's in the Automatic folder to fix the pop issue
And all of this because it's using Gazzelle Gun sounds derp : /