Combination Drills is a collection of Developed Scale exercises for Brass Instruments, designed to allow the aspiring brass wind musician to practice a variety of musical and technical skills simultaneously, thus unifying their airflow approach and getting the best value for their practice time.

These exercises have been developed by Bryan Davis, a world-renowned Lead Trumpeter originally from the UK, who now lives and works in New York City. In addition to his busy playing schedule, Mr Davis has become one of the most sought after trumpet teachers working today; regularly consulting with players from all over the world, helping them play more easily and efficiently, and assisting those recovering from lip injuries.