The album features surprising jazz solos sculpted on exotic chord progressions. The rhythm guitar is defined by straight power chord progressions. Leonard particularly uses chord progressions that are classical in shape. Death metal may include chromatic chord progressions and a varied song structure. Downie's vocal style changed while the band experimented with song structures and chord progressions. The most basic three-chord progressions of Western harmony have only major chords. Tense-sounding chromatic or tritone relationships are used in a number of metal chord progressions. Dominant chords are important to cadential progressions. Power metal often makes use of Major chord progressions as well as circle progressions. A detailed discussion of chord progressions follows. For whatever reason, I started to become obsessed with pop melodies and pop chord progressions. Nontraditional chord progressions also became more widely accepted. "Doublespeak" features walls of feedback against piano chord progressions. The following is a list of commonly used chord progressions in music. Here is code for chord progressions of the second strain.