I made a quick and dirty video showing off the sounds in ground forces battles.
It seems some people haven't realized that the game only plays plane sounds to a maximum of 1km out and after that abruptly cuts it off.
When a plane is incoming, it won't play the sound until around 500-700 meters out and it will often start very abrutply as well.
If an enemy planes' engine is louder than yours it's most likely because these new sounds are louder than the original sounds (as they should be) and while playing in a plane, your sound is unchanged from the originals (as he didn't implement any player sounds other than the jet from what I can tell).
The germans do sound a bit like you're standing in a tunnel and listening to planes flying outside, but I assume that's because of a lack of good sound sources.
Anyway, here's my video: Youtube.com
Oddball_E8
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