Roustom started playing guitar and the Arabic oud before becoming a composer of contemporary classical music. His compositions have been crossing
musical genres: Among others, his music has been commissioned by conductor
Daniel Barenboim and the
West-Eastern Divan Orchestra, the
Kronos Quartet, and the British
choreographer Shobana Jeyasingh. Further, he has written
musical arrangements for pop musicians
Shakira and
Tina Turner, as well as
film scores for movies. His music has been performed at festivals and concert venues, including the
BBC Proms, the
Salzburg Festival, the
Lucerne Festival, the
Carnegie Hall, the
Pierre Boulez Hall and the
Teatro Colon. Roustom's music has been characterized as "rooted in two worlds", with references to both Western and Middle Eastern literary and musical traditions. His
clarinet concerto Adrift on the Wine-dark Sea was composed in 2017 for fellow Syrian-American musician
Kinan Azmeh and the Deutsches Symphony Orchestra. In composing this work, Roustom was inspired both by
Homer’s
Odyssey and by the fate of Syrian refugee
Doaa Al-Zamel, as "both embark on a perilous sea journey in an attempt to reach home, or a place of refuge." His Violin Concerto No. 1 is an
homage to
Mozart’s historical interest in Arabic and
Turkish music. It had its world
premiere in 2019, with Michael Barenboim on solo violin and the
Barenboim-Said Academy's Boulez Ensemble, conducted by
Lahav Shani in Berlin. In July 2022, British choreographer
Shobana Jeyasingh presented her work
Clorinda Agonistes - Clorinda the Warrior, a
hybrid opera with dance and video projections, at
Sadler's Wells Theatre in London and other venues. In the first act, this work follows
Claudio Monteverdi's 1624 operatic
cantata,
Il combattimento di Clorinda e Tancredi, whose story is based on
Torquato Tasso's poem
Jerusalem Liberated and set in times of the
crusades in medieval
Jerusalem. To this historical piece, Jeyasingh added Roustom's contemporary music in a second act, using Monteverdi's
baroque instrumental textures and rhythms as "points of departure." Both compositions were played live by a string quartet, with tenor
Ed Lyon singing the leading parts. Further musical elements chosen by Roustom were the Middle Eastern social dance
dabke and the recorded voice of Syrian
mezzo-soprano Dima Orsho singing in Arabic." == Selected works ==