Check out this link. Go to the sound files. There is a distinct difference in timbre between the saw and the theremin. I just saw "The Day The Earth Stood Still" last weekend and said to my wife, I said, Wife! I said, that's either a musical saw or a theremin playing those eerie sounds! And ya know what she said? She said, I could give a rats behind now go and take the trash out!
Take a listen. We have to get Gary develop a Theremin / Musica Saw library!
The beauty of the musical saw echoes in the tunnels
and tugs away at the souls of strangers
until they find themselves at the foot of this hypnotizing lure;
it is the moment that a passerbys lonely journey briefly ends.
I am told that the thicker the metal; the better the sound.
Its notes play louder than the sadness that dampens these tunnels
because it is carried by the acoustics of coincidence.
here there are no stages; so there are no barriers.
This woman who plays it, lost her legs of dance years ago;
leaving her crawling through life.
The sound of defeat was never so loud;
but in despair she finally heard the pitch of life.
It came to her one day from the singing saw.
It was in a pub in a distant land where the music finally played.
This time it was louder than the echo of life's past tragedy,
but the old man who knew the secrets of the saw refused her lessons.
It was in this that her destiny was revealed.
She knew not a note and had no patience.
The saws she found were many and their notes out of tune;
but finally a singing saw that fit; & in a moment her search was over;
finally cutting through the doors shut so long ago.
It was the instrument of chance that she learned to play.
The vibrations of her saw ripple like a pebble in a pond,
and it sings with the voice of a guardian angel and
calms with the gentleness of God's hand.
It is why I tell you,
Listen to the woman with the singing saw,
and your spirit will hear it's music
even from the jagged edges of life on the longest day of winter.