for the source.
He finally locates the origin and finds it is coming from a grave with a headstone that reads: "Ludwig van Beethoven, 1770- 1827.
Then he
realises that the music is Beethoven's Ninth Symphony and it is being played backward!
Puzzled, he leaves the graveyard and persuades a friend to return with him.
By the time they arrive back at the grave, the music has changed. This time it is the Seventh Symphony, but like the previous piece, it is being played
backwards.
Curious, the men agree to consult a music scholar. When they return with the expert, the Fifth Symphony is playing, again
backwards.
The expert notices that the symphonies are being played in the reverse order in which they were composed, the 9th, then the 7th, then the 5th.
By the next
day