Unrealistic Turboprop sounds

Hi,Among all turboprop released for FS9, there are only one which has very realistic turboprop sounds: the DASH 8 by Oleksiy Frolov. I wouls even say it has the real sound of that bird. All other, included all payware do not simulate the real noise of a prop pitch change from feather to low RPM and low RPM to High RPM.I know that Olek programmed his plane from scratch, avoiding all restriction of the FS internal machine, but here should be a way to get that fixed.I am a turboprop freak, real world pilot and always disappointed when downloading, or buying a turboprop, because the sounds are too far from what one feel when flying that kind of bird for real. Except the DASH8 by Frolov. I am not programmer, but would just understand why for instance the standard King Air is more noisy when feathered as when going from low RPM to High RPM on final. Or when going from High RPM after T.O. to a lower setting for climbing and lower for cruise there is no change in the sound. Thanks for replyingRoger