It’s my understanding that ATMOS and / or Spatial Audio is processing that is said to add additional audio dimensions and realism beyond traditional mono, stereo and quad sound. I somewhat understand the principals of how ATMOS processing affects audio, but only in the sense of listening via multiple speakers positioned around in a room. Here is what I don’t understand. Firstly, how does ATMOS affect sound heard through only two channels; left and right? Additionally, I heard a claim made in a YouTube video that ATMOS improves the sound of recordings originally mixed in stereo. He went on to say he doesn’t understand why this is so. Frankly, his claim perplexes me. He further went on to say that streaming services will soon require all recordings both current and vintage to be sent to their hosting platforms formatted in ATMOS or Spatial Audio. Please discuss.