The Kopprasch Studies refer to a collection of etudes for the trombone composed by Julius Kopprasch, a 19th-century musician. These studies are designed to help players develop their technical skills, including tone production, articulation, and range. They are widely used in trombone pedagogy and are considered essential for both beginners and advanced players. Kopprasch's etudes are typically organized by difficulty and cover various musical techniques. They are often performed in lessons and auditions, making them a staple in the trombone repertoire. Many trombone players regard these studies as a fundamental part of their practice routine.