a certain composer of yore who was said to get his musical inspiration from nightly visits from the devil himself was said to have discovered the other tone or different tone which is created by playing two . the frequency of the overtones of these notes creates a third different tone. after his discovery he was offered the position of running a very large prestidious music school.my question is that i under stand the theory but i dont hear a third tone or how i go about finding these magickal tones(and no he's not talking about cords.)has anyone heard of this ?there has to be a simple formula for utilize this without breaking out the pythagoris.