Many people think that the clarinet is a single instrument. The clarinet has a vast range of nearly four degrees of octave and is widely used. Interlude scores in many famous films use music played by clarinet, for example: in the phonograph of Let the Bullets Fly, the second movement of the Mozart Clarinet Concerto in k622a Major, and the King plays the first movement of the Mozart Clarinet Concerto in A Major. Wait, the clarinet can be ensemble or played alone.