Violin Solo - Level 4 - Digital Download SKU: A0.1016639 Composed by Charlene Kluegel. 20th Century,Instructional,Romantic Period,Standards. 3 pages. Charlene Kluegel #5734051. Published by Charlene Kluegel (A0.1016639). Simplifications and preparatory exercises to master technically difficult passages in Fritz Kreisler's Prelude and Allegro. These are the exercises that I use with my own students.