Harmony refers to the "vertical" sounds of pitches in music, which implies pitches that are played or sung jointly concurrently to make a chord. Commonly, This implies the notes are played at the same time, although harmony may additionally be implied by a melody that outlines a harmonic structure (i.e., https://portal.uaptc.edu/ICS/icsfs/best-android-voice-editing-application.html?target=171d4b64-1efc-462c-8751-2fc4a5195a8d