mmmh idk about that, I used a sound mod because I hate the stock sounds, anyway all sounds work for AI planes and migs.
There's this "VK-1.wav" sound file in the Mig-17c fresco mod, I open it, it's the engine sound and it works, I put it in the sound folder but when I load the game there's no sound, only the afterburner sound works for the mig. Same problem with the j5a mod, and the EAF Mig-17, casually they all use this VK-1 sound for the engine
I tried to follow the editing procedure but I didn't understand it well, so I go to the flight folder and open the sound.ini text file. There's a list that stops at SoundFile033=WindLoop.
In regards to the "mod" folder, I added this folder myself to use it for JSGME, sometimes I load mods manually, sometimes I use JSGME, there are not other mods folder in my game install. This is the folder where I putted a new flight cat with SoundList.ini copied from the game's flight folder, and I added a text line to the file: after SoundsFile033=windloop I wrote SoundFile034=VK-1, and then at the bottom:
[VK-1]
Priority=NORMAL
3DSound=FALSE
FrequencyControl=TRUE
NumBuffers=1
Looped=TRUE
After that I tried "activating" it with JSGME lol, Yeah sorry I'm not a modding expert. I also tried doing this directly in the game's flight folder. It didn't work