Music of the Spheres (Danish: Sfærernes Musik) is a composition by Rued Langgaard, written in 1916–18 and scored for orchestra, choir, organ, a "distant" orchestra, and a soprano soloist. The work incorporates radical innovations, considered ahead of their time, including some of the earliest examples of string piano (playing directly on the strings of the piano), and Langgaard's extensive use of slow moving string clusters prompted the composer György Ligeti to proclaim himself a "Langgaard-epigone" when presented with the score in the late 1960s.