What is a tenor tuba

“Tenor tuba” is the orchestral name for the euphonium. When you see a tenor-tuba part in an orchestral score, a euphonium is almost always the instrument that plays it. Composers writing outside the brass-band world reached for the term because “euphonium” sounded like a band instrument, while “tenor tuba” fit the orchestral family naming (with the bass tuba below it).

The famous examples:

• Holst, The Planets — the “Mars” and “Jupiter” tenor-tuba parts are euphonium showcases.
• Richard Strauss, Don Quixote and Ein Heldenleben — prominent tenor-tuba writing.
• Wagner and Ravel (the Pictures at an Exhibition orchestration’s “Bydło”) — more of the same.

Practically, an orchestral tenor-tuba part is written at concert pitch in bass clef (with tenor clef for the high passages), not in the transposed treble clef of the brass band. So the same euphonium player switches reading systems depending on whether they’re sitting in a band or an orchestra. See bass vs treble vs tenor clef.

There are rare true “tenor tubas” built slightly differently, but in the standard repertoire the word is a euphonium in orchestral clothing.

This is one question under What is it? — the full treatment lives there.

• naming
• tenor tuba
• orchestra
• notation