TrueHD not working from Windows/Jarvis to HD Amp

Im running Kodi Jarvis on a Windows 10 laptop and connecting it to an Onkyo HD amp. If I go into the audio drivers in windows I can see it is reporting that TrueHD etc is a supported format. In Kodi I am using WASAPI with pass through enabled. When I play a movie that has DolbyTrueHD audio, the video plays but I get no audio, amp does not detect anything either.
Anybody able to assist with this issue?