alt Hacker News> I am still not able to recognize a sound and understand what note that is
That is called "perfect pitch" and it is not necessary to play music. It's very rare to have perfect pitch, and it seems to be innate, not something you learn.
Contextual note recognition (relative pitch) is what musicians normally use to jam. It comes with practice and contextual clues that you pick up over tens of years (including familiarity with your jammate's instrument, even if it's not the one you play; familiarity with multiple eras of music theory; pure practice), so this shouldn't be your #1 priority since it just comes along for free (or a bit of practice), as you learn. Music playing 101 is just... playing music in your instrument. You don't need to recognize notes until you want to jam, which comes years after you start playing an instrument.
Some people seem to just be physically unable to distinguish relative pitch though.
You might want to start here: https://www.musictheory.net/ (not affiliated, I just think it's a very good resource for Music Theory 101).
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> Some people seem to just be physically unable to distinguish relative pitch though.
I used to think I was pitch blind until one day it just clicked. It just takes practice in my opinion.
Isn't perfect pitch just when you can tell a note without having a reference tone?
Once you have a point of reference things just go up and down and from there it should be manageable to identify each note.
Also, not sure about the innate thing. Seems to me that it's just a neural pathway that can be created by playing or listening to a whole lot of music while being aware of which tone is which, for example by reading the score alongside.