A repeat note chord, which is what is usually played on guitar, is a 4, 5 or 6 note chord.? It involves repeating the top melody note one octave lower. When playing the 3 note chord C, A and F.? If the C melody note was also added one octave down you would be playing C, A, F, C.? This is a 4 note chord using the same notes as found in the chord of F with one note added.?

If you played C, G and E.?with a C melody note, repeat C one octave down and you have the four note chord C, G, E, C which is the C chord with one note added.?

Play repeat note chords just mentioned and compare them with the three note chord.? Which do you prefer?? Repeat note chords are optional at the players discretion.? As a rule repeat note chords are preferred on guitar but you may wish to eliminate a repeat note in some bars for variation