Instrumental Duet,Piano Clarinet,Instrumental Duet,Piano,Viola - Level 3 - Digital Download SKU: A0.1005071 Composed by Tim Yarham. 20th Century,Contemporary. Score and parts. 50 pages. True Art is Angsty #4855135. Published by True Art is Angsty (A0.1005071). Lullaby for the Monsters Under the Bed is a double concerto for clarinet in Bb and viola, with piano reduction of the original orchestral score. This work features a duet of the two solo instruments, both showing their range and ability to impress without requiring technical mastery. .