Bass Baritone
The lowest singing voice is the male voice called bass.
a bass is the lowest male singing voice.
Bass is the name of a very low male singing voice.
The lowest normally recognised is the 'contralto'.
The lowest female voice is called contralto.
Bass
pitch
Contalto
Bass.
The lowest female voice is the Contralto; also considered the rarest in occurrance.
Baritone
Bass is below Baritone and the lowest male voice range