What part do you change in the sound.cfg to have the engine sound match the rpm of the engine. The same sound file in CFS3 and FS2004 are different with the same plane. In CFS3 the engine sounds like it is doing 2500 rpm. In FS2004 is sounds like it is only doing 1200 rpm.I hope this makes sense.

Look for the "rparam" in the sound.cfg file. This controls the playback rate of the wav file. Im not sure which parameter to change but I hope that I have pointed you in the right direction. Maybe somebody else can elaborate a little bit more. I personally use FS Sound Studio http://www.fssoundstudio.com/This is a great little tool to alter the sounds of an existing sound.cfg file.Attached is a short explanation of what you need to look for. Hope this helps. The windows are from FS Sound Studio.Kobie :-wavehttp://forums.avsim.net/user_files/70017.jpg

Greetings,A quick solution is to alter the "max_rated_horsepower" value in the "piston_engine" section of the aircraft.cfg file.This value serves to coordinate the rpms with the sound file:In the case you cite, the sound is like "1200" rpm because the HP value is too high. Odd as it seems, the lowering of the HPvalue will let the sound max-out...trial and error will give an HP value that works.An example is Bill Lyons' Waco, where the HP value had to belowered a little to enable me to use the Ryan "Spirit of St Louis" sounds....JR