I have just upgraded to PowerDVD 16 Ultra from 15 and so far all seems OK except that when I play a 3D movie ISO I am only getting basic DTS and not DTS Master HD through my amp even though there is an HD audio track available. If I play a 2D bluray movie ISO, it plays DTS Master HD without problem . I never had this problem with PowerDVD 15 so I think it must be some kind of issue with the program. With a 3D film running in TV mode I cannot find any way of checking the audio settings. I am running an HTPC in Windows 10 with an i5 processor and Radeon R7 360 graphics card.