On the one hand I'm enjoying wondering what the song would be paced like if instead of touch tone speed each number was separated by how long it would take to return to 0.

8 dit-dit-dit-dit-dit-dit-dit-dit 6 dit-dit-dit-dit-dit-dit 7 dit-dit-dit-dit-dit....

ON the other hand, touch tones were invented in the 60's, so it's possible that they had access to the tech to touch dial at that time.