This formula can work fine if you have strong singers to fill out the musical side of the equation.
Neil proved to be a strong singer, whose voice was the perfect complement to his brother's.
Humphreys was not a strong singer however and it took some time for his voice to develop.
She had a light complexion and a small frame, but was said to be "a strong singer with a dark voice".
Hepburn was not a strong singer, which the studio knew going into the project.
But she is also a strong singer in her own right, and she doesn't get to New York very often.
That decision also made it clear that the actors would have to be strong singers.
The cast of strong singers delivers them with feeling and gusto.
As well as being a strong singer she has also become a serious actress.
What's not in dispute is that he's a strong and committed singer.