Blarr composed four oratorios about the life of Jesus, four symphonies, chamber music and works for organ.[4] He also set many songs of the genre Neues Geistliches Lied to music, some of under the pseudonym Choral Brother Ogo.[5] His organ works were recorded with organists Wolfgang Abendroth and Martin Schmeding. He was a member of the ecumenical Textautoren- und Komponistengruppe der Werkgemeinschaft Musik e.V. and the association Musik in der Ev. Jugend (now: Textautoren- und Komponistengruppe TAKT.
Blarr visited Israel to experience where Jesus lived as a Jew.[6] In 1983, the Israeli composer Josef Tal dedicated his organ work Salva Venia to Blarr, who premiered it the following year in Düsseldorf. In 2016 he was awarded an honorary doctorate by the University of Warmia and Mazury in Olsztyn.[1]
1985 Kulturpreis der Landsmannschaft Ostpreußen [de] for music[5]
2006 Compositions prize of Neuss for Tangos und Choräle für Dietrich Bonhoeffer (Tangos and chorales for Dietrich Bonhoeffer), premiered on 15 June 2006 in the Christuskirche Neuss[5]
Stadt am Fluß, four short piano works (1. St. Lambertus, 2. Der Neandertaler, 3. Ich denke dein, 4. Karlrobert Kreiten); Edition Gravis, Bad Schwalbach, 1990.