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A trombone

Range of a trombone

The trombone is a brass horn musical instrument. It is similar to a large trumpet, except the player pushes and pulls on its slide to change the length of the tube.

Together with vibrations from the player's lips, the trombone can play a wide range of notes. It sounds deeper than a trumpet and is usually said to be one of the bass clef instruments. Music is normally written in the bass clef, but some high parts can be written in tenor clef. Some players have the music transposed into the treble clef. The trombone is the loudest instrument in the symphony orchestra.