 At the end of their time of schooling, only those with the best voices are accepted as Singers, while the others are given a mild form of Yehn to make them forget the Songs and then are trained as orderlies.Typically, male orderlies supervise the security of the Singers, including travelling with the Second Singer in groups of five known as Pentads, while female orderlies work in the Birthing House.Orderlies and Singers alike are required to work for a certain number of years to repay the debt for their schooling, but are then free to leave The Echorium, although many choose to stay.