dee clark! i hope this really helps
Open Call - 2012 I Sing and Sing Opera 1-23 was released on: USA: 18 October 2012
Trio
Call them
soloist
A Singer
You call it harmony.
Call your best friend or your lover
Quartet
Their Croak
A singer elf.
Those singers would be baritones. Basses sing lower still.
call their # they give in the episode of when they sing and dance then call them