Description of voice parts in barbershop:
Tenor (Soprano 1 - very high light voice, sings above lead part)
Lead (sings the melody)
Baritone (similar to an Alto I and sings above and below the lead notes. Written in the bass clef but sung an octave higher)
Bass (sings the lowest note and similar to Alto II. Also written in bass clef but sung an octave higher)