We are finding the same thing as we use the gospel ones in worship in our Saturday Night Service. They are, as a good friend says it, POW'ful!

Flat voice... I think that would be the tone of the voice-- not the pitch but the flatness of the sound, as opposed to the technically correct singing from the head voice.... it would have to do with where in your throat you put the voice, how you color the tone....

Gosh that's easier done than said!

~Susan