The trumpet, also known as the trumpet, is one of the brass instruments. Among all brass instruments, the pronunciation and sound of the pocket trumpet is the highest. The trumpet uses the treble staff notation of the staff. Use the fixed roll call method, that is, the concept of fixed treble to perform. In today’s world, there are trumpets with various tones such as B flat, D flat, E flat, E, F, G, A, high pitch (high octave) B flat, etc. These tones are determined by playing the high pitch of the first overtone series. . The trumpet we usually use is in B flat. If the pocket trumpet plays the same melody with piano, electronic piano and other C instruments, the trumpet must be increased by a second, which is the C instrument performance.

There are two types of pocket trumpets: vertical key trumpet (the piston is a trumpet that moves up and down) and flat key trumpet (the piston is a trumpet that moves in rotation). The vertical key trumpet is the most widely used.
The pocket trumpet consists of three parts: mouthpiece, tube body and machinery. The pipe is 1.355 meters long (B flat), and the mechanical part is composed of a piston and a piston sleeve. The bypass pipe is connected by pressing the piston to achieve the purpose of extending the pipe. Pistons are divided into two types: direct-lift type and rotary type.
The detailed structure of the pocket trumpet: the trumpet consists of a mouthpiece, a whistle tube (tube), three piston cylinders connected with three keys, a right pinky finger hook, a bell mouth, a tuning tube, a water gate, a left hand tuning ring, and the first tuning It is composed of sound tube, second tuning tube, and third tuning tube (emergency tuning tube).
The key of the instrument: B flat, C (the above are more commonly used), D, E flat, etc.