Cabus - Sonate for Clarinet Quartet and Harp - CQ0717EJM Editions Maurer Sale! from $57.00 Qty. Add to Cart SKU: CQ0717EJM Peter Cabus - Sonate for Clarinet Quartet and Harp. Instrumentation: E-flat Clarinet 2 B-flat Clarinets Bass Clarinet Harp