Concerto For Aluphone composed by Anders Koppel , for Orchestra and doubling Marimba. Anders Koppel prolific career as a film composer began in the mid-1970s, and in the 1980s he became much sought after as a composer for ballet. Since the premier in 1990 of Toccata for Marimba and Vibraphone, he has worked primarily as a composer in the classical world. Influenced by jazz, rock and Latin American music, Koppel ’s music is often highly virtuosic and he has often been drawn towards concertante forms.