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Re:Apple Music Announces Spatial Audio and Lossless Audio by dmix on Monday May 17, 2021 @02:25PM (#27186451)
I found a video in one of those links from Princeton. It's a narrative of this guy developing 3D sound that works in normal 2 channel laptop speakers.

It's quite impressive when they demo it. There is a moment around 1:20 that plays flies circling around and my cat next to me didnt care about the normal recording but he stood up with his ears out when the 3d version played.

https://www.youtube.com/watch?v=SQmQD27uCt0&t=3s

I know it's probably old hat by now (the video is ~10yrs old, yes 2010 was over a decade ago) but it still blows my mind.

Re:Apple Music Announces Spatial Audio and Lossless Audio by Mediterraneo10 on Monday May 17, 2021 @02:41PM (#27186658)
This is pretty old hat now. IRCAM was experimenting with spatialized sound on a stereo medium already back in the 1990s. The software they came up with was used e.g. for the Deutsche Grammophon recording of Pierre Boulez’s piece Répons where sound is moved around the hall.