Iron Butterfly was a Southern California band formed in the mid-1960s who jumped on the heavy, psychedelic bandwagon and created one of the benchmark songs of the time, *In-A-Gadda-Da-Vida.*It combined a catchy riff, a simple run, and a short chord progression with a classical organ intro and an extended jam with solos for each member into a classic rock masterpiece, although more from a historical perspective rather than musical virtuosity angle. In this lesson we look at the basic accompaniment parts but also take a classical guitar look at playing the rapid arpeggio opening. This segment would probably rate at Level 8, but the main part of the lesson is Level 5.