A basso (or bass) is a male singer who sings in the lowest vocal range of the human voice. A typical bass has a range extending from around the E below the bottom of the bass clef to the E above middle C (on the first line of the treble clef).
- A basso profundo (also basso profondo or basse noble) is a singer with a particularly deep voice; they may be able to sing as low as the B below the bass clef.
- By contrast, a basso cantate (or basse chantate) is a singer with a lighter, more lyrical voice, perhaps with a slightly higher range.
- Basso buffo is a term used for a comic bass.
- Sometimes the term bass-baritone is used to mean a singer with a range and tone somewhere between a bass and a baritone (a male voice somewhat higher than a bass).
The following is a partial list of well-known bassos:
- Kurt Böhme
- Feodor Chaliapin
- Boris Christoff
- Ezio Pinza
- Nicolai Ghiaurov
- Kurt Moll
- Samuel Ramey
- Ivan Rebroff
- Paul Robeson
- Franco Ventriglia
- Willard White
- BBC Guide to the singing voice