To play the trombone, the player first positions the mouthpiece against their lips. They then blow air through the mouthpiece, causing the air to vibrate and produce a sound. The player then uses the slide to change the length of the trombone's tube, which changes the pitch of the sound.
The player can also use the slide to create different effects, such as glissandos and vibrato. Glissandos are smooth, continuous changes in pitch, while vibrato is a rapid, back-and-forth oscillation in pitch.
The trombone is a versatile instrument that can be played in a variety of musical styles, including classical, jazz, and rock.