Another way to produce harmony is through the use of "chords." A chord is a group of pitches which are sung or played together with similar rhythm.
Double-click these examples of chords to hear them.
** IMPORTANT DEFINITION **
A Chord is a group of notes performed simultaneously.
The notes of a chord may appear in a single voice or across several voices. When chords occur, one after another, we say there is "chordal harmony." The pitches of a chord are vertically aligned, as you can see in these examples of chords.