Martin Alfsen is a songwriter, arranger and producer and the director of one of Scandnava’s best known gospel choirs: Reflex His songs have been recorded by numerous artists and choirs both domestically and abroad.In 1985 the Reflex choir made their national breakthrough with the album "REFLEX". In the late eighties and early nineties Alfsen would develop his composing and production skills when working for Master Music, Norway's leading company in contemporary christian music. His albums with Reflex would be important contributions to the repertoire of christian choirs and music groups throughout Scandinavia.

In the mid nineties Martin Alfsen was the musical director for a popular Norwegian TV series presenting well known traditional christian songs and church hymns. The TV series would result in a series of bestselling albums, produced by Alfsen for the Master Music label.

Martin Alfsen made his debut as an author in the autumn of 2002 with the book "Jesus i musikken - fra Gregoriansk sang til hiphop" (Jesus in the music from Gregorian chant to hip hop) published by Luther Forlag.
Martin was the editor of the bestselling "Gospelsangboka" (The great gospel songbook) that was published by Norsk Musikforlag in the autumn of 2005 and in the spring of 2006 his method for rythmical choirs "Jazz-Gospel-Soul-Pop Choir" was published.