Flow Studies by David Vining is designed to help you develop air flow efficiency by playing musical phrases in a wide array of ranges, keys, and rhythms. The etudes are presented in a daily format with eight etudes per day, for a total of 56 etudes. Flow Studies offers a musical way to cultivate the important technical skill of breath control, and musical incentives are always more compelling to musicians than technical ones! “This book will be a welcome addition to my library of materials centering around the idea of ‘flow’. I particularly enjoy the progression relative to harmony, style, and athleticism within each day of work. Terrific book!” Dr. Demondrae Thurman, Professor of Music (Euphonium & Chamber Music), Indiana University