This is interesting reading about the Sistine Choir.

It has been back to basics for them rebuilding the choir after getting the unfortunate tag of the 'Sistine Screamers' ... 

Great to see they are using boy's voices.  No 'castrati' of course ...

uk.yahoo.com/news/popes-choir-launches-us-tour-seeks-recapture-glory-070355563.html

www.theguardian.com/music/2016/dec/29/mark-spyropoulos-sistine-chapel-choir-pope-vatican

Here's a little taster -