This 1948 ad startled me, since I had never heard of such a thing. And "voice-like beauty"? Well, I could not imagine that. But then I went off to You Tube and sure enough there were loads of clips of people playing the saw, and saw-playing tutorials. The things you learn on YouTube!
According to Wikipedia there were 10 companies manufacturing musical saws in the early 20th century. And did you know that Marlene Dietrich was a sawyer (as they are called) and played the saw both in Berlin and for the troops in World War II? Tom Waits and Sarah McLachlan are among the modern artists who have used the saw in their music.
Here's a Norwegian commercial for Christmas grogg, starring Natalia Paruz, the "Saw Lady," whose site is linked below. She is very gracious to the grogg guy in the silver jacket, don't you think?And the saw really does have a strange, haunting vocal sound.
Natalia Paruz, the "Saw Lady," has a most informative website, if you want to learn more. And if you're in New York you can go to the NYC Saw Festival - it's in July.