Clarinet Quartet,Woodwind Ensemble Bass Clarinet - Level 3 - Digital Download SKU: A0.1486487 Composed by Marc Shaiman and Scott Wittman. Arranged by Talitha Broughton. Broadway,Musical/Show. 21 pages. Boxed Goblin Music #1063549. Published by Boxed Goblin Music (A0.1486487). Clarinet quartet (Bb/Bb/Bb/Bass) arrangement of It Must Be Believed To Be Seen, the Act I closing number from the musical Charlie And The Chocolate Factory.