2 Note Power Chords for Beginning Guitar Players This chart lists 2 note power chords in 4 different keys. Beginner guitar players can use this to play along with songs in one of those keys. It follows the circle of 5ths and provides the I - IV - V chords in the of G, A, C and D. 2-note power chords called DYADS. They are often used by more advanced players when playing in a band. Playing 2 notes simplifies the sonic footprint of most rock songs where instrument sounds overlap. Too many sounds overlapping makes music sound distorted and in a band this can be a problem. Playing a 2-note chord is a simple way to solve this problem,