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Playing back immersive audio
Finally, let's play immersive audio, but only when we know that the system is fully equipped for spatial audio.

Introduction
Before we begin
Playing Dolby Audio
Because not every system has Dolby Audio, we want to first make sure that Dolby Audio plays in our setup.
Querying mediatype support
Not every mediatype is supported everywhere, so we need to detect what the playback system can do and adapt to it.
Implementing fallback in media frameworks
When our preferred datatype is not supported, we need to make sure by way of some fallback logic that audio and video are still playing .
Checking for immersive audio capability
Even when the codec of choice is supported, your system may not be equipped with spatial playback, so we need to check for it.
Playing back immersive audio
Finally, let's play immersive audio, but only when we know that the system is fully equipped for spatial audio.
- Dolby Atmos in Dolby Digital Plus
  Learn how to play Dolby Atmos in Dolby Digital Plus.
- Dolby Atmos in Dolby AC-4
  Learn how to play Dolby Atmos in Dolby AC-4.
- Playing encrypted media
  Sometimes, playing immersive audio as encrypted media works better.
Selecting by language and for accessibility
When everything is said and done, there may still be more than one experience to pick from. Let's find that which best matches the user's preferences.
Bringing it all together
For the grand finale, we will bring everything together: an example with languages, fallback, immersive audio, and accessibility.
Appendix
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Playing back immersive audio

Finally, let's play immersive audio, but only when we know that the system is fully equipped for spatial audio.

We already know how to use dash.js to drop those AdaptationSets that cannot be decoded. We also learned how to figure out whether the system can render immersive audio; so we now need to put this together such that dash.js also drops immersive-audio AdaptationSets when they can't be decoded and rendered into an immersive experience. ^[1]

[1] We are leaving out some detail here. If dropping an AdaptationSet leaves no audio to play, then it should not be dropped. dash.js is however not currently set up to prevent dropping the last remaining AdaptationSet.