Julia Perry's Homunculus C.F., scored for harp, celesta/piano, and eight additional percussionists, was composed during the summer of 1960 in Akron, Ohio, and completed in 1961.
In Perry's record liner notes, she stated, "Having selected percussion instruments for my formulae, then maneuvering and distilling them by means of the 'Chord of the Fifteenth' (C.F.
95–105), featuring an increasingly dense texture while presenting the first four pitches in the chord only; and the fourth and final section combines each element of harmony, melody, and rhythm in a recapitulation, while introducing the remaining pitches of the chord upon which the work is based (A-sharp, C-sharp, and E-sharp).
Norman Bergen performed the celesta part on the original recording with the Manhattan Percussion Ensemble, dated January 28, 1965 at Steinway Hall.
was recorded by the Manhattan Percussion Ensemble on January 28, 1965, at Steinway Hall, 57th Street, conducted by Paul Price.