Chord

a group of three or more notes that, when played simultaneously, can form a harmonic structure that can support a melody or a solo line. The simplest chords are triads, which are made of the first note of a scale and then alternate notes. For example, in the scale of C Major (C,D,E,F,G,A,B,C), the triad would be C,E,G. Seventh chords use four notes: they consist of a triad with an added interval. For example, in the scale of G Dominant (G,A,B,C,D,E,F,G), the four-note seventh chord would be G,B,D,F. There are also more complicated chords which add additional intervals (see ninth chord, "alt dom"). A chord can also be played one note at a time (see "arpeggio" and "broken chord").


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