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. 

A person who plays the trombone is called a trombonist. Some trombones have a valve which increases the range of available notes. The name *trombone* comes from the Italian language and means *large trumpet*. Trombones are nearly always made out of brass but can also be made out of plastic: the "P-bone".

History
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The forerunner to today's trombone was called the sackbut. It was first used in the 16th century during the Renaissance era of music. In the centuries that followed, the sackbut was gradually improved into today's trombone. Beethoven was the first composer to add trombones to the standard symphony orchestra. Many different types of music use the unique sound of the trombone to add color and depth. Trombones are used in orchestras, concert bands, marching bands, brass bands, big bands, swing bands, ska bands, and jazz ensembles. In the symphony orchestra, it is common to see trombones in a section of three: two tenors and a bass. In a standard big band, a four player section is more typical. This time with three tenors and one bass as the normal arrangement.

In the hands of a skilled trombonist, the trombone is a very versatile instrument and can play many styles. The trombone can go from smooth, sweet jazz ballads and peaceful slow melodies such as Duke Ellington's "Pyramid", to fast and technical passages from pieces like "Blue Bells of Scotland" and "Carnival of Venice".

Types
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A tenor trombone
A bass trombone with F Trigger
A valved contrabass trombone
There are a lot of types of trombones. Each one is for different playing ranges (how high or low you play). There are contrabass trombones, bass trombones, tenor bass trombones, tenor trombones, alto trombones, soprano trombones, and piccolo trombones. These are the different types of trombones, arranged according to general usage.

* The **tenor trombone** is the most popular trombone type in use today, and is usually what people mean when they say "trombone". It is usually the first instrument a new trombonist will play. It has a slide that is used to change notes and make music. People who play the tenor trombone usually play from bass clef but some very good players can play from treble clef. Better and more expensive tenor trombones have an F attachment.
* The **bass trombone** is different from the tenor trombone because it has one or two triggers, and has a larger bell, which makes it sound better in lower octaves. Most bands have only one bass trombonist. Usually, if a song does not have a bass trombone part, the bass trombonist reads off the 3rd or 4th trombone part.
* The **alto trombone** is a type of trombone that is somewhat higher sounding than a regular trombone. It is mostly used in orchestras where the highest part is sometimes easier to play on an alto trombone. However, it is not very common and most of the time, a tenor trombone plays the alto trombone part if one exists.
* The **contrabass trombone** is the lowest-sounding trombone used in music today. It sometimes has a double slide, meaning that the slide tube wraps twice instead of once like on a tenor trombone.
* The **soprano trombone** is a type of trombone that plays in the same range as a Bb trumpet.
* The **valve trombone** is just a tenor trombone with a valve section. These valves work the same as those on a trumpet, euphonium, etc.

Marching band with trombones

Famous trombonists
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Some famous trombonists include:

* Edward ‘Kid’ Ory
* Bill Watrous
* Carl Fontana
* Jim Robinson
* Jack Teagarden
* Al Grey
* Glenn Miller
* Tommy Dorsey
* Pete Ramberg
* Lawrence Brown
* Curtis Fuller
* Slide Hampton
* Fred Wesley
* Trombone Shorty
* Martin Schippers
* Christian Lindberg
* Joseph Alessi
* Christopher Bill
* Wycliffe Gordon

Other websites
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Wikimedia Commons has media related to ***Trombones***.

The Simple English Wiktionary has a definition for:

 ***trombone***.

* International Trombone Association
* Trombone Page of the World
* TrombonesOnline  Archived 2007-07-11 at the Wayback Machine - Trombone Portal and Trombonist Directory
* British Trombone Society
* Finnish Trombone and Tuba Association Archived 2005-05-21 at the Wayback Machine
* Online Trombone Journal