1875 – Born on January 28th in Ahualulco, Mexico. Mexican composer, a leading 20th-century exponent of microtonal music (i.e., music using intervals smaller than a halftone, or half step).
1895 – Carrillo’s interest in microtonal music was stimulated by a class in Mexico on acoustics.
1905 – He held many important music positions in Mexico as composer, conductor, teacher, writer on music, and administrator.
1920 – He began intensive investigations into the possibilities of composing with these microtonal intervals, through sixteenth tones, which he considered the smallest interval listeners could readily hear.
1965 – Died on September 9th in Mexico City.