I said it but way less directly and clearly than you in my post above... Thanks to be right on the target and so concrete to be then understood by all......
There is as i said a precise rigorously defined concept of "immersiveness" in acoustic...
I will cite my own post to complement your post :
Immersive audio is NOT the same as immersive acoustic...
Immersive audio use DSP generally without psycho-acoustic measures of the inner ears and HRTF. ... ( save for example the Smyth realizer)
Immersiveness in PHYSICAL acoustic is created by passive material treatment and active mechanical control of the room...
Immersiveness in psycho-acoustic use measures of the inner ears and also Head-related transfer functions (HRTFs) describe the filtering of the acoustic field produced by a sound source arriving at the listener’s ear. It is used in smyth realizer but at a more sophisticated level by BACCH filters...
s I have read through the above posts it call goes back and forth somewhat comically to me. All immersive is stereo. Everything is stereo. There is nothing else besides stereo. Atmos cannot supercede stereo. Nothing else exists besides stereo. And because there was some debate above about whether anyone dare say 100%, I dare say everyone, i.e., 100% in this thread can only hear stereo, unless there is someone here that insists they have more than two ears, perhaps an extra ear on their back, their elbow or someplace. Stereo means two, as in two ears, two auditory senses. Our ears sense spatially and make other assessments based on milliseconds of timing, and so do are ears/mind assess accuracy, clarity, transparency, etc. that have little to do with the spatial issues
I will only add that even spatialization as Timbre is constrained and created by our TWO ears/brain, and we can create it in an acoustically controlled room partially without DSP and without measures on our inner ear and pinnae and without HRTF measures, mechanically by modifying the zone pressures distribution in a small room and the balance and timing with incoming reflections.., It cannot be perfect doing so mechanicaklly but this give us an idea about the power of acoustic controls in a room...
«I don’t know what happens when we die, but maybe we go somewhere between 10^18 Hz and 10^43 Hz» Stuart Hameroff
https://twitter.com/StuartHameroff/status/1692253150093422799
