We’ve updated our Video and Audio Asset Guide to offer more requirements for delivering authentic immersive audio. Notable highlights include the below best practices for Dolby Atmos. 

Dolby Atmos audio files generated from stereo mixes are not allowed. Specifically:

• Dolby Atmos tracks must be created from multitracks or stems created from multitracks.
• The use of upmixing from a stereo release is not allowed.
  
• Extracting stems or “de-mixing” from a stereo release is not allowed.
  
• A Dolby Atmos track consisting only of a stereo mix placed in the sound field and added ambience/reverb is not allowed.
  

For the full list of Dolby Atmos deliverables, visit our Immersive Audio Source Profile in the updated Video and Audio Asset Guide.