(ROYAL WARM-UP MASTER'S BOOKS BASS TROMBONE N-1) This series of books are made to avoid different problems, which develop when an ideal warm-up is not done, it is heated badly or not at all with the mouthpiece and the trombone. In the world of brass instrument players, many manias and diseases develop, such as Bell's palsy, oromandibular dystonia, bruxism, Satchmo Syndrome and stage anxiety. It is important to have a total command of the diaphragm...