Lip Slurs Until now, there has not been a bass clef euphonium book dedicated to the lip slur. Lip slurs are specific exercises designed to develop flexibility and are essential in building strength and developing technique. This collection of lip slurs, offering exercises for multiple stages of ability and development, serves both young euphonium students and more advanced players. As a companion to Lip Slurs for Tuba, this book may be used in a classroom setting as well as in individual practice.