Flight1's Cessna 421C - need a sound expert

Gotta new sound file for the C421 with very nice prop sync fxs. But these effects are not linked to the prop sync switch. You only hear those sounds for some time when change the throttle or the prop setting, until the props sync again.Actually the prop sync switch is there for nothing. Turn it off or on it is a placebo.Is it possible to adjust the sound.cfg in a way, that you can hear the props getting out of sync when u turn prop sync off. That would be just great.Every advice is highly appreciated.Alex