Missa Latina: Kyrie. Autograph musical manuscript score signed in full. Ca. 2006

Small folio (302 x 220 mm.). 1 page. Notated in pencil on 12-stave music paper "Archives 12S-12 Stave." 4 measures of the beginning of the Kyrie. Scored for mixed chorus, vibraphone, xylophone, bongos, tam-tam, and two pianos. With autograph signature to lower right margin. The Missa Latina, composed in 2006, was commissioned by the National Symphony Orchestra. The work is scored for soprano and baritone soloists, SATB chorus, and orchestra. The present excerpt appears to be part of a 2-piano reduction.

"[Born in Puerto Rico], Sierra continued his studies abroad, first at the RCM (1976-8) and then at the Institute for Sonology in Utrecht (1978-9). From 1979 to 1982, he worked with Ligeti at the Hamburg Hochschule für Musik ... [In 1992], he began to teach at Cornell University. As Sierra's style has evolved, he has synthesized European modernism - with Ligeti, he developed an abstract thought process - with elements of Puerto Rican and Latin American folksong, jazz, salsa and African rhythms, a process he calls 'tropicalization'." Laurie Shulman in Grove Music Online.