Julián Carrillo Trujillo (January 28, 1875 – September 9, 1965) was a Mexican composer, conductor, violinist and music theorist, famous for developing a theory of microtonal music which he dubbed "The Thirteenth Sound" (Sonido 13).
Carrillo's best-known composition is Preludio a Colón.
- Julian Carrillo and the 13th Sound a microtonal musical system[dead link] - English & Spanish, by Ernesto Solís Winkler.
- Julián Carrillo (Centre George Pompidou)[dead link] - French
- National Centre for Investigation, Documentation and Musical Information[dead link] - Spanish
- Julián Carrillo at My Space - Spanish (not a dead link, but mostly nothing to see)
- Sonido 13: Towards the musical Infinite - Spanish[dead link] by J.R. Martínez y S. Palomares-Sánchez.
- Two movements from Suite Impromptu (1931), for quartertone guitar on Stichting Huygens-Fokker
- Julián Carrillo: Testimonio de una vida[dead link] About the book edited by the council of San Luis Potosí in 1992. (Gabriel Ríos) - Spanish
- Article from the journal 'La Jornada' - Spanish[dead link]
- Sonido 13 - An easy explannation by Jesús Herrera - Spanish.[dead link]
- Performer Jimena Giménez Cacho performs works by Carrillo on the Cello>[dead link]
- Mexican Houses of Parliament about Carrillo - Cámara de Diputados. - México, D.F. a 21 de noviembre de 1930
- El Poder de la Palabra. Short bibliography of Julián Carrillo
- Eduardo Sánchez, La Habana 1928
- La Jornada, Jimena Jiménez, December 2005 - article in Spanish[dead link]
- Comet (music clip posted on Facebook by Alan Keith)