I have raised this issue before, so will try once again! There are some complaints about the engine sounds in the new AH3!
The one big compliant that I have and it would eliminate some of the other complaints, is the engines on the B-17 do not react correctly for sound, when changing power settings. When adjusting the prop settings from full increase, such as takeoff, and you reduce to cruise climb, the manifold pressure "follows" the RPM of the prop, no matter what! If you reduce the RPM, the manifold should increase slightly, which would change the engine sound.
Maybe there is a lot to "rewrite" in correcting this, but would make the sounds more realistic!
I am not sure if this is happening on all other aircraft engines, but suspect that it is happening there to by comments I hear!