Viera, Julio (Martín)
- Valdemar Axel Roldan
(b Buenos Aires, 1943). Argentine composer. He studied at the Argentina Catholic University and with Francisco Kroepfl. He trained in electro-acoustic music at the Centre for Research into Mass Communication (now the Laboratory for Musical Research and Production) and later became the head of this organization. A professor at La Plata University, he is also secretary of the Argentine Federation of Electro-Acoustic Music and the Agrupación Nueva Música. His honours include commendations from both the National Fund for the Arts and the Bourges International Competition of Electro-Acoustic Music, the Buenos Aires Municipal Prize, a Guggenheim Foundation grant (1989) and the National Prize (1992). In 1997 he received commissions from the Groupe de Recherches Musicales and the Koussevitzky Foundation. He was awarded the chair of composition at the Argentina Catholic University in 1998.