https://www.musical-u.com/learn/chord-ear-training-101-2/
It might seem magical when someone sits down at the piano or picks up the guitar and seems to know every song.
With a little chord ear training, you can do it too!
Even if you don’t play chords on your instrument, chord ear training is essential for guiding you in playing by ear, including for bassists, saxophonists, fiddle players and more.
Musical-U talks about recognizing individual chords and then moving on to recognizing sequences of chords, known as chord progressions. Read to discover how you can learn to play chords by ear.