A bass-baritone is a type of male singing voice that combines the qualities of both a bass and a baritone. This voice type typically has a rich, deep tone and can sing in a lower range than a baritone but higher than a bass. Bass-baritones often perform roles in opera and classical music that require a powerful and resonant sound, making them versatile in various musical styles. In opera, bass-baritones often portray characters with authority or gravitas, such as kings, villains, or wise figures. Famous bass-baritones include Dmitri Hvorostovsky and Thomas Quasthoff, who have showcased their talents in renowned operas and concert performances. Their unique vocal range allows them to deliver both dramatic and lyrical passages effectively.