<P> An obelisk (†) after the name of a clef indicates that the clef is no longer in common use . </P> <P> Where the G - clef is placed on the second line of the stave, it is called the treble clef . This is the most common clef used today, and the only G - clef still in use . For this reason, the terms G - clef and treble clef are often seen as synonymous . The treble clef was historically used to mark a treble, or pre-pubescent, voice part . </P> <P> Among the instruments that use treble clef are the violin, flute, oboe, bagpipe, cor anglais, all clarinets, all saxophones, horn, trumpet, cornet, vibraphone, xylophone, mandolin, recorder; it is also used for the guitar, which sounds an octave lower than written, as well as the euphonium and baritone horn, both of which sound a major ninth lower . Treble clef is the upper stave of the grand stave used for harp and keyboard instruments . It is also sometimes used, along with tenor clef, for the highest notes played by bass - clef instruments such as the cello, double bass (which sounds an octave lower), bassoon, and trombone . The viola also sometimes uses treble clef for very high notes . Treble clef is used for the soprano, mezzo - soprano, alto, contralto and tenor voices . The tenor voice sounds an octave lower, and is often written using an octave clef (see below) or double - treble clef . </P> <P> In the seventeenth and eighteenth centuries, a special clef was used for violin music, particularly that published in France . For this reason it is known as the French clef or French violin clef although it was more commonly used for flute music . The G - clef is placed on the first line of the stave and is identical to the bass clef transposed up two octaves . </P>

What is the purpose of a treble clef
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