sentence: with the exception of the bass , the voice parts in barbershop singing do not correspond closely to their classical music counterparts ; the tenor range and tessitura are similar to those of the classical countertenor , the baritone resembles the heldentenor or lyric baritone in range and a tenor in tessitura , and the lead generally corresponds to the tenor of classical repertoire , with some singers possessing a tessitura more similar to that of a high baritone .