DOLBY ATMOS and DTS:X Playback Demystified
To see if your receiver is playing Dolby Atmos or DTS:X content, on most Home Theater receiver press the INFO (i) button on the receiver remote to display the current source name, volume, sound mode name, and other information on the TV or Projector screen.
Expect to see the following for Dolby Atmos or DTS:X:
Dolby Atmos PCM format is always decoded as Dolby Atmos. In other situations Dolby Atmos contents are decoded as Dolby TrueHD or Dolby Plus.
DTS:X contents are decoded as DTS-HD.