https://www.musical-u.com/learn/how-can-i-improve-at-harmonic-intervals/
Discerning harmonic intervals by ear is a valuable tool for any player.
It can be pretty challenging at first.
In this free article, we share 4 tips to help with harmonic interval ear training. https://www.musical-u.com/learn/how-can-i-improve-at-harmonic-intervals/