Harmony refers back to the "vertical" sounds of pitches in music, which suggests pitches which are performed or sung together simultaneously to create a chord. Typically, this means the notes are played concurrently, Whilst harmony might also be implied by a melody that outlines a harmonic composition (i.e., by using https://my.ciis.edu/ICS/icsfs/this-is-the-difference-between-mp3-and-wav.html?target=41a83c69-2bd0-4f2c-9a8d-124ebc091322