
Alto trombone is pitched in the key of Eb or F. Along with this if the trombone has an attachment or a trigger which most likely will put the trombone in the key of Bb. The alto trombone is used mostly in orchestras because of the range that this trombone can produce. This type of trombone uses a mouthpiece with a shallower cup size than that of a tenor trombone usually uses, which makes it easier to play in a higher register.
A good tenor trombone player can play all of the notes given to an alto trombone. It's just a lot easier to play with a good tone in that register on a tenor. The bore on an alto trombone is the same as that of tenor trombones without the F attachment and few with the F attachment.
The alto trombone is read in alto clef in which the bottom line is a concert F. The following slide positions are concert notes for an Eb alto trombone. In the first position Eb2, Eb3, Bb3, Eb4, G4, Bb4, Db5, Eb5 and F5. Obviously, like all other trombones, as the slide moves down the pitch will move down a half step per slide position. If the alto that you are playing is in the key of F, you can just take each of those notes and move them up a whole step.


