Unpopular Opinion
Welcome to the Unpopular Opinion community!
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Vote the opposite of the norm.
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Your ears can tell if something is coming from:
In front
Behind
Front right
Back left
etc
We don't just percieve audio from left right so with 7.1 support an artist can take advantage of it and make different sounds come from different areas for a more full listening experience (though i doubt many actually do that)
Even some headphones can emulate 3d audio pretty well so it's not an exclusive use for surround sound speakers
If course it can, and it can do better for certain frequencies than for others I think.
However, the point is that this is not because you have more than two "sensors" for sound, but rather because of some clever processing of the signals in the brain. The information that the brain uses however can be coded into the stereo signal, under the assumption that it will be listened to with a controlled setup like headphones.