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was a Canadian-American composer and ethnomusicologist. He is best known for being the first Western composer to make a musicological study of Bali, and to develop American gamelan along with fellow composer Lou Harrison. He wrote original music influenced by that of Bali and Java, decades before such compositions that were based on world music became widespread. 

McPhee joined the circle of experimental composers known as the "ultra-modernists" and was among those—along with the group's leader, Henry Cowell, John J. Becker, and Cowell protégé Lou Harrison—particularly interested in what would later become known as "world music". McPhee and his wife moved to Bali together for Belo's anthropological work. Once there McPhee studied, filmed and wrote extensively about the culture and music of the gamelans, and in 1936 wrote an original musical score, Tabuh Tabuhan, in the Balinese style.

McPhee, who was gay, divorced Belo in 1939. In the early 1940s he lived in a large brownstone in Brooklyn, which he shared with W. H. Auden and Benjamin Britten, among others.

In 1942, he arranged Britten's Variations on a Theme of Frank Bridge, a work for string orchestra, for two pianos, to be used for Lew Christensen's ballet Jinx.[6] McPhee was responsible for introducing Britten to the Balinese music that influenced such works by the British composer as The Prince of the Pagodas, Curlew River, and Death in Venice.

In 1947, McPhee published a book A House in Bali, about Balinese culture and music during the 1930s. Later in the decade, McPhee fell into an alcohol-fueled depression, but began to write music again during the 1950s. He became professor of ethnomusicology at UCLA in 1958 and was also a respected jazz critic. He died in Los Angeles.

In the 1990s, Alex Pauk's Esprit Orchestra recorded and released renditions of several never previously recorded compositions by McPhee. This resulted in McPhee receiving posthumous Juno Award nominations for Best Classical Composition for "Symphony No. 2" at the Juno Awards of 1998 and "Concerto for Wind Orchestra" at the Juno Awards of 1999. He won the award in 1999.

American composer Evan Ziporyn wrote an opera about McPhee's life, titled A House in Bali. The opera premiered at Puri Saraswati in Ubud, Bali, on June 26 and 27, 2009.

In 2017, an album Peter Pears: Balinese Ceremonial Music, performed Thomas Bartlett & Nico Muhly and partly based on McPhee's transcriptions, was released on the Nonesuch/Warners label.