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I am now at the moment digging around with my engine sounds as well because as much as I love them, not all of them work for me. For some reason I have never been able to get sounds for my Corsairs, F4F's and F6F's. That has been damned frustrating for me as I am a big fan of the PTO.

After some experimenting with the associated *.prs files by way of changing the association of *.wav files to that which I have had no problem with, I have found that I can reinstate sounds for these aircraft even if they are not the intended ones. This seemed to work for me, but then I noticed it was only while I was still in the current session. If I shut the PC down and later returned for another session, all sounds for these aircraft were again lost. :roll:.... So I shut IL-2 down and then start it up again... still no sound. Then I thought, "Oh crap don't tell me it's another one of those crappy file integrity things again?". So I shut IL-2 down again, open each of the motor.PrattWhitney *.prs files again (because I don't know exactly which one belongs to each aircraft) and then save them without changing anything, start up IL-2 again and viola!! I have engine sounds again!!!

Sweet Jesus... these mods have been sent to test me I'm sure of it :mrgreen:

I only wish you had made this discovery about two months ago, CrazySchmidt. I had the exact same problem, with the same aircraft. It was absolutely mystifying and I tried everything I could think of to isolate the cause, including swapping prs files around, renaming samples files, altering mod order, re-downloading the wrapper and buttons files - finally even making a dual install of IL2 and re-introducing freshly downloaded mods, one by one, step by step. That finally solved it for me, but it was a very laborious way of doing it.
By substituting samples and prs files I proved to my own satisfaction that it was something to do with the prs files, but I couldn't see anything wrong with them and had never heard of 'file integrity' problems - so I didn't post my findings when you first made a plea for a solution. I think there are many others with the same or similar sound issues, so this is a very significant discovery.

My apologies to Bolox... :wink: