https://www.musical-u.com/learn/solfege-do-re-mi-isnt-childs-play/
Have you ever felt a melody go in one ear and out the other? Solfege (a.k.a. solfa) provides a framework for melodies by establishing recognizable relationships between pitches, and training your ear to hear patterns. https://www.musical-u.com/learn/solfege-do-re-mi-isnt-childs-play/