Tessitura
The range of pitches within which a vocal part predominantly sits—not the extreme highs and lows a singer can hit, but the "comfortable working range" where most of the notes fall. Tessitura is crucial in casting: a role might technically be within a performer's range but exhausting if the tessitura sits at the top of their voice for extended periods. Smart composers write tessituras that showcase a voice type's strengths.
