Interactive tool
Euphonium 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.
The euphonium is written two completely different ways — transposed treble clef in the brass band, concert-pitch bass (or tenor) clef everywhere else — and the same written note means different pitches in each. This tool converts between them.
Pick any concert pitch on the keyboard. The brass-band staff shows how that note is written in treble clef (a major ninth higher); the concert staff shows the sounding pitch and switches to tenor clef up high. The euphonium fingering lights up on the valves, and Hear it plays the note. Lock the concert clef to bass or tenor to see exactly why the switch happens.
Pick a concert note. The brass-band staff writes it a major ninth higher; the concert staff shows the sounding pitch and switches to tenor clef up high. Lock the clef to see why that switch exists. Valves light with the euphonium fingering.
Use it to sight-read a part in the “wrong” clef, to settle a band-room argument, or just to build the two reading systems into your ear. For the full story of why the euphonium carries two notations — and which one you’ll meet in each ensemble — read the pillar it belongs to: