B-Flat Trumpet,Piano - Level 1 - Digital Download SKU: A0.1148410 By Eric Clapton. By Bob Dylan. Arranged by Art.o Artaud. Chamber,Children,Film/TV,Instructional,Standards. Score and part. 2 pages. Art.o Artaud #748583. Published by Art.o Artaud (A0.1148410). Arrangement for EASY level trumpet and EASY level piano of Bob Dylan’s Knockin’ on Heaven’s Door, in the key of G major student/teacher duet.