Cello Duet Cello - Level 1 - Digital Download SKU: A0.836240 Composed by Martin Luther. Arranged by Evelyn E. Bloom & Edna J. Bloom. Sacred. Score. 3 pages. Bloom Musicnotes #5869335. Published by Bloom Musicnotes (A0.836240). Suitable for students approaching the end of their first method book and beyond, A Mighty Fortress Bass Clef Duet modulates from the key of C to D halfway through.  The transition provides a handy place for players to switch parts if desired.  Part 1 = melody & Part 2 = harmony throughout.Cello, Bass, Trombone, Baritone, TubaThis title coordinates with item 442986 A Mighty Fortress Treble Clef Duet.