Much vocal music has been transcribed for tuba, but little is available for advanced-level players. Coloratura opera arias offer material that would be challenging for more experienced tubists, and these types of arias are much less text-dependent than other kinds of vocal music.
This according to Guidelines for transcribing coloratura opera arias for tuba, with transcriptions of three arias by Vivaldi, Gluck, and Delibes by Robert Lynn, a 2005 dissertation for Ball State University.
Above, a performance by TubaDiva (Jennifer Paradis-Hagar); below, Alessandro Fossi performs Musetta’s aria “Quando me’n vo” from Puccini’s La Bohème.