Although it's interesting how the author breaks this down, I didn't think it was necessarily unknown that phone key tones could be used to make basic melodies.

Although it's interesting how the author breaks this down, I didn't think it was necessarily unknown that phone key tones could be used to make basic melodies. When i get stuck in a freezer, I know that I can hack my phone (or a pocket calculator) to play certain songs with the key tones to alert my robot friend to save me. Thanks Johnny!