Bach Trumpet Mouthpiece Visualizer The Embouchure visualizer is designed for teachers to start a player off with the correct embouchure from the beginning These student aid tools show at a glance when the mouthpiece is too high or too low on the lips, whether the lower jaw recedes, whether the tongue protrudes during the attack, and many other embouchure faults Double embouchure visualizer accommodates a trumpet on one end and a trombone on the other These student aid tools show at a glance when the mouthpiece is too high or too low on the lips, whether the lower jaw recedes, whether the tongue protrudes during the attack, and many other embouchure faults Double embouchure visualizer accommodates a trumpet on one end and a trombone on the other