Bass clarinets typically are available in two variations. Some devices could have a variety to low Eb, with that lowest key on the bell, while others can have a variety extending to a low C. TRY THIS LITTLE EXERCISE RIGHT NOW!Some people just don't get it. Flattening that chin is just a hard concept to understand. Now, do this little exercise. Do this: Place your thumb and index finger on the back of your hand. Press down and pull the hands apart as when you are stretching the outside of the back of your hand from among those two hands. Now, put the clarinet mouthpiece in your mouth, anchor your lower lip with the reed, close the mouth off across the mouthpiece and flatten or point the chin. If you are pulling down as it should be, the surface between your lower lip and chin should stretch or “firm up” like the skin on the back of your hand stretched by the fingers. Clarinet is held too high. This angle of clarinet affects embouchure poorly.