"It makes such a difference--in quality of tone and in effect--whether
you sing in a small or large space. Things you do in the studio and
which may sound well there, are quite different or are lost altogether
in a large hall. You really cannot tell what the effect will be in a
great space, by what you do in your studio. In rehearsing and study, I
use half voice, and only occasionally do I use full voice, that is when
I wish to get a better idea of the effect."