Vocal harmony means singing notes at a different pitch alongside the main melody to create harmony. Layering notes above or below the lead adds thickness and color to the vocal.
The basic idea
A harmony note is not simply a fixed distance from the lead; you choose notes that fit the chord currently sounding. Thirds and sixths are an easy starting point, but the right note changes from song to song.
Its role in writing and performing
Adding harmony on important words in the chorus or at the peak of a melody strengthens the emotion. Placing it only where it is needed, rather than everywhere, makes it easier to keep the lead in front.
How to check it in a DAW
Duplicate the lead MIDI and move some of the notes up or down while watching the chords. Landing on chord tones helps the part blend with the backing.
Difference from related terms
Vocal harmony means stacking different pitches, while unison means doubling the same melody. Chorus can refer to the whole multi-voice production that includes both.
Before layering it across the whole song, try a short spot such as the last words of the chorus, and you are less likely to go wrong.
