CDs are in every way better than vinyl records. They are smaller, much higher quality audio, lower noise floor and don’t wear out by being played. The fact that CD sales are behind vinyl is a sign that the world has gone mad. The fact you can rip and stream your own CD media is fantastic because generally remasters are not good and streaming services typically only have remastered versions, not originals. You have no control on streaming services about what version of an album you’re served or whether it’ll still be there tomorrow. Not an issue with physical media.
The vast majority of people listen to music using equipment that produces audio of poor quality, especially those that stream using ear buds. It makes me very sad when people don’t care that what they’re listening to could sound so much better, especially if played through a hifi from a CD player, or using half decent (not beats) headphones.
There’s plenty of good sounding and well produced music out there, but it’s typically played back through the equivalent of two cans and some string. I’m not sure people remember how good good music can sound when played back through good kit.
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.