According to Richard E. Rodda, "'Minimalist' music is based upon the repetition of slowly changing common chords [chords that are diatonic to more than one key, or else triads, either just major, or major and minor—see: common tone] in steady rhythms, often overlaid with a lyrical melody in long, arching phrases...[It] utilizes repetitive melodic patterns, consonant harmonies, motoric rhythms, and a deliberate striving for aural beauty."