Transposition
7 articles on transposition from Euphonium Studio.
In this section
Notation
One sound, two pages: how brass-band and concert parts notate the same note differently — and how to read whichever one lands on your stand.
Notation transposer
A free interactive tool that converts any euphonium note between brass-band treble clef and concert bass or tenor clef — see the two staves side by side, and hear the pitch.
I'm a band director — which part do I give my euphonium player
Give a euphonium player the clef they read fluently, not the one you assume. Most US school players read concert bass clef; brass-band-trained players read transposed treble. Good publishers include both — ask first.
What does 'sounds a major ninth lower' mean
A major ninth is an octave plus a whole step. On a treble-clef euphonium part, a written C sounds the B♭ a major ninth below — the fixed interval that defines the brass-band transposition.
Bass vs treble vs tenor clef for euphonium
Euphonium parts appear in three clefs: concert bass clef (orchestra, US wind band), transposed treble clef (brass band), and occasionally tenor clef in high orchestral writing. Each signals a different reading system.
Can a trumpet or cornet player read a euphonium part
A treble-clef brass band euphonium part reads exactly like a B♭ trumpet part — same clef, same transposition — just an octave lower in sound. A cornet player can sight-read it immediately.
Why is my brass band euphonium part written in treble clef?
British brass bands notate almost every instrument in transposed treble clef so players can switch horns without relearning to read. Your B♭ euphonium sounds a major ninth below the written note.