Frederik Reesen Magle is a Danish composer, concert organist, and pianist. He writes contemporary classical music as well as fusion of classical music and other genres. His compositions include orchestral works, cantatas, chamber music, and solo works, including several compositions commissioned by the Danish royal family. Magle has gained a reputation as an organ virtuoso, and as a composer and performing artist who does not refrain from venturing into more experimental projects – often with improvisation – bordering jazz, electronica, and other non-classical genres.

An organist is a musician who plays any type of organ. An organist may play solo organ works, play with an ensemble or orchestra, or accompany one or more singers or instrumental soloists. In addition, an organist may accompany congregational hymn-singing and play liturgical music.