Forum Post

jjdolbypro (Customer) asked a question.

November 22, 2023 at 5:14 PM
Stereo render and exported mp4 sound wrong
I'm using headphones. When I listen to the mix in Pro Tools thru the Renderer set to binaural headphone mode, it sounds fine. When I export an Atmos WAV master and listen back in the Renderer set to binaural, it sounds fine. When I set the Renderer to stereo headphone mode, or when I export to mp4 even with binaural mode checked, some ambiance effects are gone and some elements (like a voice or guitar) are louder than they should be. :( ???

Mac Studio, Pro Tools 2023.3, RME Babyface, headphones (Sony MDR-7506 or wired Earpods)
  • 2 answers

  • jjdolbypro (Customer)

    I think I fixed it, sort of. You have to go into Pro Tools export and "create re-render" and set to binaural. It does sound a bit different though, a little less full. I read somewhere that it doesn't include LFE. Which seems like a needless omission but what do I know. I still wanna know why the Renderer doesn't make a faithful mp4, at least one that can be played back on normal headphones?

  • BennettS (Dolby Labs)

    Hi,

    The mp4 is a DD+JOC file, which is intended for speaker-based playback, not headphone binaural playback. More information on using the mp4 for qc is here:     https://professionalsupport.dolby.com/s/article/How-do-I-QC-my-Dolby-Atmos-mix

    If you want an offline file for binaural QC you will need to create a binaural re-render. More information on re-renders is available in module 3.2 of the free online Atmos training at     learning.dolby.com

    -B
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