Youth and Children's Orchestras), a non-profit organization that works to form orchestras and educate young people in several cities around Chile. Their programme reaches more than 12,000 teens and children every year, and their orchestras perform concerts that reach an audience of almost a million. Among the best known Chilean classical composers are José Zapiola Cortés, Enrique Soro and Pedro Humberto Allende. Allende put special effort to include some elements of Chilean tradition and folklore in his work, with works such as the symphonic poem “La Voz de las Calles” (The Voice of the Streets); “Doce Tonadas para Piano” (Twelve Tunes for Piano); and the “Concierto Sinfónico para Violoncello y Orquesta” (Symphonic Concerto for Cello and Orchestra), whose rhythmic richness was praised by Claude Debussy. Other important Chilean composers include Vicente Bianchi known for his compositions based on Pablo Neruda poems; Alfonso Leng, one of the most influential Chilean classical composers with a mystic and romantic style influenced by Wagnerian Post-romanticism; Luis Advis Vitaglich, known by his work (“Cantata de Santa Maria de Iquique”); Carlos Riesco; Domingo Santa Cruz Wilson; Roberto Falabella Correa; Nina Frick Ajenjo; Carlos Isamitt; Juan Orrego-Salas; Alfonso Letelier; Gustavo Becerra-Schmidt; Sergio Ortega; Leon Schidlowsky; Leni Alexander; Fernando García; Juan Allende-Blin; Cirilo Vila; Santiago Vera-Rivera; Andrés Alcalde; René Amengual; Próspero Bisquertt; Gabriel Brncic; Salvador Candiani; Acario Cotapos; Alejandro Guarello; Hans Helfritz; María Elena Hurtado; Tomás Lefever; Eduardo Maturana; Claudio Spies; Jorge Urrutia Blondel and Darwin Vargas, among many others. Among the most prominent conductors are Fernando Rosas Pfingsthorn, Armando Carvajal, Juan Pablo Izquierdo, Sebastián Errázuriz and Víctor Tevah. One of the best-known performers is pianist Claudio Arrau, known for his vast repertoire spanning from baroque to 20th-century composers, especially Beethoven, Schubert, Chopin, Schumann, Liszt and Brahms. He is widely considered one of the greatest pianists of the twentieth century. Other great include Rosita Renard, Oscar Gacitúa Weston, Roberto Bravo, Elena Waiss, Elisa Alsina, Liza Chung, Alfredo Perl and currently Valentín Trujillo, who has interpreted a repertoire of classical as well as popular music, and is well known for taking part in television programmes. Today, Chilean classical music has had a strong boost thanks to the efforts of the International Society for Chilean Music (SIMUC) and outstanding performers such as Luis Orlandini, Eulogio Dávalos Llanos, Nicolas Emilfork, Romilio Orellana, Carlos Pérez, Cristián Alvear Montecino and Juan Antonio Escobar. These have had a significant influence on the work of