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Trombones are a family of brass instruments characterized by their adjustable slides. Trombones actually come in a consort, including the contrabass, G bass, Bb bass, symphonic (large bore) tenor, jazz (small bore) tenor, Eb alto, F alto, soprano, and sopranino trombones. In general, the lower-pitched the instrument, the easier pitch is to control given the larger slide movement relative to the same pitch adjustment on the larger instruments.
Trombones are a family of brass instruments characterized by their adjustable slides. Trombones actually come in a consort, including the contrabass, G bass, Bb bass, symphonic (large bore) tenor, jazz (small bore) tenor, Eb alto, F alto, soprano, and sopranino trombones. In general, the lower-pitched the instrument, the easier pitch is to control given the larger slide movement relative to the same pitch adjustment on the larger instruments.


Trombones are usually written in concert pitch, with a couple of exceptions:
Trombones are usually written in concert pitch.
- Contrabass, G bass, and Bb bass are all written in bass clef, untransposed.  
* Contrabass, G bass, and Bb bass are all written in bass clef, untransposed.  
- Tenor trombones can be written in bass clef or tenor clef untransposed, and occasionally (in British brass bands) in treble clef transposed up a major ninth.
* Tenor trombones can be written in bass clef or tenor clef untransposed, and occasionally (in British brass bands) in treble clef transposed up a major ninth.
- Alto trombones are written in alto clef, untransposed.
* Alto trombones are written in alto clef, untransposed.
- Soprano trombones are usually written in treble clef, untransposed or (less commonly) up a whole step, the same as Bb trumpets.
* Soprano trombones are usually written in treble clef, untransposed or (less commonly) up a whole step, the same as Bb trumpets.


Like most brass instruments, trombones sound on an approximated [[harmonic series]], and their ability to gliss encompasses tritones descending downward from each partial. For example, tenor trombones, pitched in Bb have partials of Bb-Bb-F-Bb-D-F-Ab-Bb . . . as per a 1:2:3:4:5:6:7:8 . . . harmonic series, and the glisses can descend a tritone down from each of those partials. This system gives trombones unparalled pitch sensitivity compared to other brass instruments, and in expert hands, trombones are extremely versatile, capable of being extremely lyrical, blending, or raucus as the orchestration requires.
Like most brass instruments, trombones sound on an approximated [[harmonic series]], and their ability to gliss encompasses tritones descending downward from each partial. For example, tenor trombones, pitched in Bb have partials of Bb-Bb-F-Bb-D-F-Ab-Bb . . . as per a 1:2:3:4:5:6:7:8 . . . harmonic series, and the glisses can descend a tritone down from each of those partials. This system gives trombones unparalled pitch sensitivity compared to other brass instruments, and in expert hands, trombones are extremely versatile, capable of being extremely lyrical, blending, or raucus as the orchestration requires.