Alcides Emigdio Lanza (born 2 June 1929) is a Canadian composer, conductor, pianist, and music educator of Argentinian birth. He became a naturalized Canadian citizen in 1976. As both a composer and performer he is known as an exponent of contemporary classical music and avant-garde music. His works often utilize a combination of traditional and unusual instruments, and incorporate electronic sounds and extensions. He is also known for using special lighting effects when presenting his music. Many of his compositions are published by Boosey & Hawkes, and Lanza himself owns his own publishing company, Shelan Editions. He is an associate of the Canadian Music Centre and a member of the Canadian League of Composers.