Sospeso performs music by Héctor Alberto Tosar Errecart on the American Voices concert at the Americas Society Fortieth Anniversary Celebration on November 9, 2005.   

The Uruguayan pianist, conductor and composer was one of the leading musical figures of Latin America in the last century. Tosar studied with Mújica, Kolischer and Baldi. He studied in Tanglewood with Aarón Copland alongside with other prominent Latin American artists ,including Alberto Ginastera, Roque Cordero and Julián Orbón. Upon receiving a grant from the Guggenheim foundation, he studied with Honegger and Koussevistzky at the Composers Forum in Middlebury, Vermont. He then moved to Paris where he continued studying with Honegger, in addition to Rivier and Milhaud.

He presided over the Núcleo Música Nueva society of Montevideo as web as the Uruguayan Society of Contemporary Music. He conducted the Montevideo Symphonic Orquestra. He was a faculty member at various institutions including the Music Conservatory of Puerto Rico, and the Composition Department during a brief period at the Indiana University School of Music.

His works comprise several pieces for piano, voice, solo instruments, chorus, chamber, orchestral and symphonic music, as well as incidental music for theater and films.