Went up & flew around & all was working OK except......................
The new engine sound would throttle up w/ my throttle just fine & WEP would also throttle up when enabled & throttle back to 100% mil when disabled..........but the engine sound wouldn't throttle back down when throttle was pulled back................stayed at 100% throttle until I landed & hit the brakes........when I envoked the brakes the engine sound then returned to idle..........
Now while on the ground the engine sound synched w/ the throttle just fine........
All other items, tach, airspeed, etc worked as expected from throttle positioning......just the engine sound did not stay synched w/ the throttle while in flight...............
This was while flying the Spit IX.....................
Will take up other planes & test.......................