Is the whistle of the clarinet a consumable     Many people buy the clarinet for the first time, which is wrong. The whistle is consumables, often blowing will often change the whistle. Generally, the clarinet whistle is usually 2.5, and the 2.5 whistle is slightly thicker and hard than the 2.0 whistle. The hardness of the clarinet whistle is generally divided into numbers 2,2.5,3,3.5,4,4.5 and 5. Number 2.5 is the most soft and easy to pronounce, suitable for beginners, and Number 5 is the hardest and less used. From 2 to 5, but the tone will get better and better, the player can choose suitable whistles according to their own foundation.