[Biggs]

I'm not going to go dig up the quote, but luthier already mentioned that the audio (engine sounds/ gun sounds) are synthed.... They werent able to aquire real merlin and dimlerbenz recordings but instead are using russian engine recordings that are then tweaked to try and sound like merlins and DBs...

As far as the gun sounds are concerned, he said something like, "we are trying something different", and that "they might take some getting used to".... Not quite sure what he meant by that...

In short, no real SFX in CoD.... Expect something along the lines of what we are familiar with in IL-2.

EDIT: Ok... Dug up the quotes from luthier anyway...
"We're still working on sounds. Engine and gun sounds are pretty good in my opinion, but a lot of people will take some time to get used to them because they're not what you expect, especially guns as heard from inside the cockpit. We got some funny bug reports about that from some beta testers."

"We couldn't record the real Merlin or a Daimler Benz or basically any real engine from BoB era due to a limited budget. There aren't any in Russia, and we couldn't fly out our sound engineer to the UK or Germany with all his equipment.

We do have the recordings of the real engines of course made with various Russian aircraft this summer. Using advanced SFX magic we transformed our samples to sound the way we needed."