The music of the twentieth century is remarkably diverse in its styles and techniques; there is no single common practice in this music, rather, a wide spectrum of materials and treatments. This course is designed to familiarize students with the most widely used of these, including extended tertian harmony, quartal and secondal harmony, church modes, pandiatonicism, polytonality, interval sets, atonalism, twelve-tone serialism, synthetic scales, rhythmic and metric devices, and changes in music notation that have occurred due to the composition of music with aleatoric elements. Analytical systems developed by prominent composer/theorists will be studied (e.g. Hindemith, Hanson, Forte) and used along with the analytical practices studied in earlier music theory courses. Compositions from the 20th Century will be considered in historical and analytical contexts. Prerequisite: MCTH204 and 206, MCHL350 and 351 or approval of department chairperson.