Evgeniy Alexiev, baritone Graciela Araya, mezzo Fulvio Bettini, baritone Ana Cernicova, soprano Paul Armin Edelmann, baritone María Espada, soprano Pablo García López, tenor César Augusto Gutiérrez, tenor Roman Ialcic, bass Enrico Iviglia, tenor Donald Kaasch, tenor Juanita Lascarro, soprano Thomas Laske, baritone Carlos Llabrés, tenor Siphiwe McKenzie, soprano Berna Perles, soprano Mireia Pintó, mezzo
