Musical pillars at Hampi, India - Rock melting technology and cymatics?

The Vittala temple at Hampi is known for its mysterious musical pillars. The pillars create a variety of different music and sounds, perplexing archeologists and scientist.
How do these pillars create music? Did ancient builders use rock melting technology to alter the nature of rocks?

            

More and more Mexican artefacts surface depicting Aliens

Many will know the Klaus Dona artefacts. There are tons more where they come from. More and more locals and farmers are showing their private artefacts. Fortunately they did not give their artefacts to the Smithsonian Institute and the like for further analysis.