Male choirs (1st tenor, 2nd tenor, baritone and bass) even without trebles or boy sopranos have a slight advantage over women in that 1st tenors singing in the falsetto range of their voice can extend the range to encompass most of the range available to an SATB (soprano, alto, tenor, bass) choir. As a consequence 1st tenors sing a very different part of the chords in a piece of music, often moving above the tenor staff and using the falsetto. Arguably the most well-known male choruses are those in Wales, but there are highly skilled choirs around the world.