The reed is on the bottom of the mouthpiece, urgent in opposition t the player's lower lip, while the top teeth continually contact the tip of the mouthpiece some avid gamers roll the higher lip under the end teeth to form what is called a 'double lip' embouchure. Adjustments in the power and shape of the embouchure change the tone and intonation tuning. It is not uncommon for clarinetists to employ how you can relieve the force on the higher teeth and inner lower lip by attaching pads to the top of the mouthpiece or putting transient padding on the front lower teeth, frequently from folded paper. Next is the fast barrel; this part of the tool may be prolonged to fine tune the clarinet. As the pitch of the clarinet in all fairness temperature delicate, some instruments have interchangeable barrels whose lengths vary a little. Additional reimbursement for pitch variant and tuning can be made by pulling out the barrel and thus expanding the instrument's length, especially common in group playing through which clarinets are tuned to other instruments comparable to in an orchestra or concert band. Some performers use a plastic barrel with a thumbwheel that adjusts the barrel length. On basset horns and lower clarinets, the barrel is invariably changed by a curved metal neck. The main body of most clarinets is divided into the higher joint, the holes and most keys of that are operated by the left hand, and the lower joint with holes and most keys operated by the correct hand. Some clarinets have a single joint: on some basset horns and bigger clarinets the 2 joints are held along with a screw clamp and aren't disassembled for garage. The left thumb operates both a tone hole and the sign in key.