Power Chords
Probably the most common sound in Blues rhythm guitar is the shuffle rhythm played on two strings. This rhythm pattern uses what are commonly called fifth chords, or power chords.
Technically a chord requires three or more notes, but as these two note fingerings are now commonly used in several styles of music they are referred to as chords. Three popular fifth chords in the open position are A5, D5 and E5, which can work together as chords I, IV and V in the key of A.
A7
D7
E7
Practice changing between these chords until you can play them smoothly and in time. Use all downstrokes when playing this style. Notice the use of staccato even though it is not written.
To complete the pattern for the classic shuffle sound, the third finger is placed two frets up the neck on the same string as the first finger. The same two strings are played as in the fifth chord. Keep the first finger down even when playing with the third finger. This will result in a smoother, more solid sound.
