A movie playing music with the push sound of the telephone

When pushing the button of the touch-tone telephone, "Pi · Po · Pa" sounds, but the movie playing music using that sound. I think that some people tried to play something on the phone, but I think that there are not many people who played using four phones including cell phones. Let's see how much work it is.

The movie is from the following.YouTube - Touch Tone Phone Symphony


that? I feel that the sound is slightly out of the way, but let's not touched it.

By the way, 150 movies tried what happens when we ring the ring tones all at once.

YouTube - 150 cell phone ring-tones at once


I do not know what type of ringtone is flowing at all.