Sonata of the clarinet      Clarinet Sonata is a kind of music writing method of clarinet instrument. A sonata, from Italian sonare, meant to sing, existed before the 16th century. In the 16th century, it refers to all instrumental music, compared with vocal music. In the early 17th century, instrumental ensemble composed of five or more contrasting segments was generally considered sonata. When playing clarinet, be sure to breathe in the abdomen, not in the chest, and fill the tube with a relaxed and constant mouth. When playing weak, keep the mouth relaxed, keep the steady air flow and pressure with abdominal pressure; play the high voice to have the feeling of blowing the middle tone area; play the middle tone area to have the feeling of blowing the bass area.