Sound presets

[Oscarito]

Do you know some tutorial about IL-2 sound presets files?
Case is that since 4.12v we have the option to customize in game sounds but I have no idea about how to do that.
I want to make external sounds more audible from inside cockpit but whatever the parameter I change (try & error...) in acoustics presets files, sounds seems to remain unchanged.
I have some complete sets of .wav sound samples plus presets files from available sound mod packs but don't know how to deal with them...