Mezzo or Alto. Can often sing the high notes like a soprano, but won’t feel comfortable staying there for a very long time. This is because of tessitura. What is tessitura? Its basically your vocal register. Most mezzos prefer to stay in the middle register, from the G note below the middle C to a high B or C. Mezzo soprano voices tend to have deeper and darker voices. Famous examples include k.d.lang and Karen Carpenter, Teressa Berganza and Cecilia Bartoli.