Instrumental Duet Clarinet,Guitar,Instrumental Duet - Level 3 - Digital Download SKU: A0.531939 Composed by W. Peterson-Berger. Arranged by Klas Krantz. Classical,Romantic Period,Wedding. Score and parts. 6 pages. Amadeus Music #74093. Published by Amadeus Music (A0.531939). Wilhelm Peterson-Berger (1867-1942), was a Swedish composer and music critic. As a composer, his main musical influences were Grieg and Wagner as well as Swedish folk idiom.