noun: the lowest male singing voice
noun: a man who has a very low singing voice
noun: the musical part for a bass voice or for an instrument that plays very low notes
noun: the lower half of the full range of musical notes
Make middles in the bass as much as possible. Roots and middles, and middles and tops, do well in arrangements; for example, F and A. [Scientific Basis and Build of Music, page 85]