What is a Tone Row?

A tone row is an ordered sequence of the twelve different pitch classes of the chromatic scale, arranged so that each pitch appears once before any note is repeated. It serves as the basic structural material in twelve-tone or serial music.

In twelve-tone composition, the tone row acts as the foundation for melodies, harmonies, and musical development. Composers can manipulate the row through several transformations, including transposition, inversion, retrograde, and retrograde inversion, creating variations while maintaining the same set of pitches.

Tone rows are most closely associated with twelve-tone technique developed by Arnold Schoenberg and later used by composers such as Anton Webern and Alban Berg. This method allowed composers to organize atonal music systematically without relying on traditional tonal harmony or key centers.