It's True

The trombone is a musical instrument in the brass family, popularly used in jazz music. Like all brass instruments, sound is produced when the player's vibrating lips cause the air column inside the instrument to vibrate. Nearly all trombones have a telescoping slide mechanism that varies the length of the instrument to change the pitch. Trombone's first premiere in jazz was with Dixieland Jazz as a supporting role. This role later grew into the spotlight as players such as JJ Johnson and Jack Teagarden began to experiment more with the instrument, finding that it can fill in roles along with the saxophone and trumpet in Bebop Jazz.