Vandoren 5RV Lyre Bb Clarinet MouthpieceBEAK AND PITCH The difference between Profile 88 and Traditional mouthpieces is in the exterior angle of the beak. Therefore, the musician is free to choose the model which suits their purpose in terms of best playing position, easiest sound projection, greatest playing comfort, and the most controllable and precise articulation. Vandoren has developed the 13 series mouthpiece specifically for American clarinetists using A440 pitch. Originally, four