The bass-baritone voice is distinguished by two attributes. First, it must be capable of singing comfortably in a baritonal tessitura. It must also, however, have the resonant lower range typically associated with the bass. For example, the role of Wotan in Die Walküre covers the range from F at the bottom of the bass clef to F# above middle C, but only infrequently descends beyond the C below middle C. Bass-baritones are typically divided into two separate categories: lyric bass-baritone and dramatic bass-baritone.
The term bass-baritone is roughly synonymous with the Italian term Basso cantando; for example, in Verdi, Philip II in Don Carlos is usually taken by a bass-baritone, while Ferrando in Il Trovatore is sung by a true bass—though the two roles' ranges are very similar. In Debussy's Pelléas et Mélisande the lower baritone role of Golaud is a bass-baritone, sitting between Pelleas (high baritone) and Arkel (bass). See fach for more. Much of the oratorio repertoire, from Handel's Messiah to Mendelssohn's Elijah is best suited to a bass-baritone with the ability to combine a rich, dark tone with a smooth high-lying cantabile line. Many of the Mozart baritone roles such as Don Giovanni, Figaro and Gugliemo — composed before the term "baritone" gained currency — are typically played by a bass-baritone.