Richard Bunger Evans, also known as Richard Bunger, (born 1942) is an American composer and pianist who worked with John Cage and subsequently wrote "the classic book on John Cage," "The Well-Prepared Piano".
 Evans has composed and performed music for opera and musical theatre, piano, art songs, prepared piano, choral music, string orchestra and chamber music.
 Evans continues to compose and perform in these various genres, and is highly respected as an accompanist to singers.
 During his 17-year career as a music professor, Evans was named one of two Outstanding Professors of 1981–1982 in the California State University system.
Graham Sheen (born 1952) is a bassoonist, teacher, composer and arranger.
 He is principal bassoonist of both the BBC Symphony Orchestra (since 1983) and the Academy of St Martin in the Fields (since 1976).
 From 1979 he has been professor of bassoon at the Guildhall School of Music and Drama, where he also teaches chamber music, orchestral repertoire and bassoon ensemble.
 His published works include solo works for bassoon, chamber music for both winds and strings and three song cycles.
 He has made numerous arrangements for wind ensemble and three volumes of graded pieces for the bassoon are published by Faber Music.
 He has recently recorded two solo albums for SFZ music.
Robert Paterson (born April 29, 1970) is an American composer of contemporary classical music, as well as a conductor and percussionist.
 His catalog includes over 90 compositions.
 He has been called a "modern day master" and is primarily known for his colorful orchestral works, large body of chamber music and clear vocal writing in his operas, choral works, vocal chamber works and song cycles.
Scott Gendel (born June 24, 1977) is an American composer, pianist, and vocal coach.
 Gendel is known mostly for his art songs and choral music, but has also written numerous operas and musical theatre works, as well as orchestral and chamber music.
Jeffrey Ryan (born 1962 in Toronto, Ontario, Canada) is a Canadian composer.
 His compositional style ranges from opera, art song, and choral music to chamber ensemble and orchestral works.
 Ryan has been commissioned by the Cleveland Orchestra, the Windsor Symphony, Esprit Orchestra, Tapestry New Opera Works, the Arditti Quartet, and Elektra Women's Choir.
 Repeat performances have been presented by such ensembles as the Montreal Symphony Orchestra (Orchestre symphonique de Montréal), the Winnipeg Symphony Orchestra, the Thunder Bay Symphony Orchestra, the Victoria Symphony, the Canadian Chamber Choir, the Florida Orchestra, and the South Dakota Symphony Orchestra, as well as numerous art song teams and chamber ensembles.
Stephen Paulus (August 24, 1949 – October 19, 2014) was a Grammy winning American composer, best known for his operas and choral music.
 His best-known piece is his 1982 opera "The Postman Always Rings Twice", one of several operas he composed for the Opera Theatre of St. Louis, which prompted "The New York Times" to call him "a young man on the road to big things".
 His style is essentially tonal, and melodic and romantic by nature.
 He received grants from the National Endowment for the Arts and Guggenheim Foundation and won the prestigious Kennedy Center Friedheim Prize.
 He was commissioned by such notable organizations as the Minnesota Opera, the Chamber Music Society of Lincoln Center, Opera Theatre of Saint Louis, the Saint Louis Chamber Chorus, the American Composers Orchestra, the Dale Warland Singers, the Harvard Glee Club and the New York Choral Society.
 Paulus was a passionate advocate for the works and careers of his colleagues.
 He co-founded the American Composers Forum in 1973, the largest composer service organization in the U.S., and served as the Symphony and Concert Representative on the ASCAP Board of Directors from 1990 until his death (from complications following a stroke in July 2013) in 2014.
William Allaudin Mathieu (born 1937) is a composer, pianist, choir director, music teacher, and author.
 He began recording his music and compositions in the 1970s on his record label, Cold Mountain Music.
 Mathieu has composed and recorded solo piano works, chamber pieces, choral music, and song cycles, and he has written four books on music, music theory, and how to live a musical life.
James Westman (born September 16, 1972) is a Canadian baritone known for his interpretation of the Verdi, Puccini and bel canto operatic repertoire, and particularly his signature role of Germont in "La traviata", which he has sung in over 150 performances, with opera companies such as San Francisco Opera, Houston Grand Opera, Pittsburgh Opera, Florida Grand Opera, Graz Opera, Santa Fe Opera, Chicago Lyric Opera, Opéra de Montréal, Los Angeles Opera, Grand Théâtre de Bordeaux, Canadian Opera Company, Boston Lyric Opera, Cologne Opera, Vancouver Opera, English National Opera, San Diego Opera, Dallas Opera, Utah Opera, and Opera Theatre of St. Louis.
 On January 29, 2011 Westman created the lead role of Sandy Keith In the world premiere of Bramwell Tovey's The Inventor.
 In 2017 he played Sir John A. MacDonald in Harry Somers's Louis Riel for the Canadian Opera Company's tribute to Canada's 150th celebrations.
 As a recitalist, he has performed for the Marilyn Horne Foundation, Aldeburgh Connection, Aldeburgh Festival, Musikverein, Wigmore Hall, Queen Elizabeth Hall, Morgan Library & Museum, Koerner Hall, Carnegie Hall, Saito Kinen Festival in Japan, Stratford Summer Music, British Broadcasting Corporation, and the Canadian Broadcasting Corporation.
 Westman first came to attention at the age of twelve when he was the first boy soprano to perform and record Mahler "4th Symphony" with Benjamin Zander and the Boston Philharmonic Orchestra in 1984.
 Westman is regularly featured as the Anthem singer for the Toronto Maple Leafs and numerous other NHL franchises.
 Four of Westman's recordings have been nominated for a Juno Award.
 Two recordings nominated for a Grammy Award.
Marilyn Horne (born January 16, 1934) is an American mezzo-soprano opera singer.
 She specialized in roles requiring a large sound, beauty of tone, excellent breath support, and the ability to execute difficult coloratura passages.
 She is a recipient of the National Medal of Arts (1992) and the Kennedy Center Honors (1995).
 She has won four Grammy Awards.
Ben Moore (born January 2, 1960) is an American composer whose works include art song, musical theatre, cabaret, chamber music, choral music and opera.
 His songs have been recorded by Deborah Voigt, Susan Graham Nathan Gunn and Lawrence Brownlee on the EMI, SonyBMG, Warner Classics and Opus Arte labels.
 Other singers who have performed his music include Frederica von Stade, Jerry Hadley, Robert White, and Audra McDonald.
 "Ben Moore – 14 songs" was published by G. Schirmer in 2006.
 The Metropolitan Opera's farewell gala for Joseph Volpe, broadcast nationally on PBS in 2006, featured two of his operatic parody songs.
 His song cycles include "So Free Am I" commissioned by the Marilyn Horne Foundation, "Ode to a Nightingale" and "Dear Theo".
 Moore wrote the score for the opera "Enemies, a Love Story" which premiered at Palm Beach Opera in February, 2015, and for "Odyssey", commissioned by the Glimmerglass Festival.

Question: Ben Moore, is an American composer whose works include art song, musical theatre, cabaret, chamber music, choral music and opera, his song cycles include which song, commissioned by the Marilyn Horne Foundation, Horne was an American mezzo-soprano opera singer?
Answer: So Free Am I