please tell me the keys of a trombone

Keys of a trombone?

Do you mean pitch, or valves? Trombones have no valves (unless they're valve trombones).

Most trombones are in C, so there's no transposition needed from C parts.

You usually write the trombone part in concert key, but it's common in brass bands/ensambels that they're transposed.

Alto Trombone in Eb : Transposed in treble, reason:
too many leger lines if written in bass clef.

The alto trombone isn't an ordinary member of the orchestra, but you may sometimes encounter them in some symponic works mostly...


Tenor Trombone in Bb : Usually written in bass clef and tenor clef when it goes high for a long period of time. Can also be transposed in treble, thus sounding an octav plus an major second below written notes(this metod is most commonly used in brass bands/ensambels).

The tenor trombone is the standard trombone in the orchestra.


Bass Trombone in Bb : Bass clef, what else would it be? Altough it can be transposed in treble(once again, this metod is most commonly used in brass bands/ensambels).

The bass trombone isn't an ordinary member of the orchestra, but it's far more common than the alto in terms of apperances in symponic and wind band works.


Contrabass Trombone in Bb?(can't remember) : Bass clef. Altough it can be transposed in treble(even as it's far more common for it to be written in bass clef).

The contrabass trombone isn't an ordinary member of the orchestra, and it's rare, very rare indeed, even in symponic works, and in wind bands... it is not even used of what I know.


Hope that's what you were looking for.

QUOTE (Wind_Player @ Sep 24 2004, 05:12 AM)

You usually write the trombone part in concert key, but it's common in brass bands/ensambels that they're transposed. Alto Trombone in Eb : Transposed in treble, reason: too many leger lines if written in bass clef. The alto trombone isn't an ordinary member of the orchestra, but you may sometimes encounter them in some symponic works mostly... Tenor Trombone in Bb : Usually written in bass clef and tenor clef when it goes high for a long period of time. Can also be transposed in treble, thus sounding an octav plus an major second below written notes(this metod is most commonly used in brass bands/ensambels). The tenor trombone is the standard trombone in the orchestra. Bass Trombone in Bb : Bass clef, what else would it be? Altough it can be transposed in treble(once again, this metod is most commonly used in brass bands/ensambels). The bass trombone isn't an ordinary member of the orchestra, but it's far more common than the alto in terms of apperances in symponic and wind band works.

This is a bit misleading. In Mozart's time (e.g., in his Requiem), the standard trombone section would have been an alto in D, a tenor in Bb and a bass in G, the last with a slide with a handle to reach 7th position. These were usually written in the corresponding clefs, alto, tenor and bass, all in concert pitch. These instruments were specified also by Beethoven (e.g. 9th symph.) and Schumann (e.g. Rhenish) but they notated both the upper parts in alto clef. During the 19th C., two tenors and one bass (still the G) became usual in much of Europe, with the tenors usually notated in tenor clef, though some composers (e.g. Dvorak, Shostakovich) continued to write their parts in alto clef. Another strand is Debussy' s preference, also followed by Dukas, for a section of three tenors. The practice of notating tenor trombone parts in bass clef is a 20th C. one, AFAIK. It relates conveniently to the advent of the plug trombone (c. 1950?) that allows tenor players to cover the bass range in an emergency.

With the late 20th C. interest in historically informed performance, the older instruments are being played again. The alto never fell out of favour altogether, and many G basses survive.

QUOTE

Contrabass Trombone in Bb?(can't remember) : Bass clef. Altough it can be transposed in treble(even as it's far more common for it to be written in bass clef). The contrabass trombone isn't an ordinary member of the orchestra, and it's rare, very rare indeed, even in symponic works, and in wind bands... it is not even used of what I know.

This is so in my experience also. Berlioz writes in his memoirs of seeing a double slide contrabass in Germany (he was not impressed by its musicality), and it is thought that the cimbasso for which Verdi writes (he never puts a tuba in his pit orchestras) was some sort of contrabass trombone, probably with valves.