Clarinet,Guitar,Instrumental Duet - Level 4 - Digital Download SKU: A0.531660 Composed by Wolfgang Amadeus Mozart. Arranged by Klas Krantz. Classical. 6 pages. Amadeus Music #4751. Published by Amadeus Music (A0.531660). Andante (main theme) from Piano Concerto No. 21, KV.467 by W.A. Mozart (1756-1791). Often called Elvira Madigan from the 1967 swedish film by Bo Wideberg. The original key is F major.