i have a 2600h just swaped to none arc input monitor 2, i have atmose issue on both inputs. Fire tv 4k, xbox one s blue ray player both do not show atmos, both thow on display xbox multi in +dsur and dd+ +dsur. on firestick. it is very fustrating. only on plex does it have the atmos on the movie button but when selected it shows dd+ + dsur on denon display, i have my speakers set up as 2 front to back to midle cieling speakers a centre and a subwoofer. to me thats 5.1.2 havent changed cieling speakers to front hight cause they arent front speakers but i might try that. any sugestions?