Dear Hesperis,

Being in Europe I can't receive that channel so can't help with the people.

I can imagine that it would be reasonably easy to design and tune instruments precisely with water. I've seen some quite sophisticated music played on fine wine glasses, carefully tuned to scales with precise and differing amounts of water to give the right notes. You play the glasses by rubbing the lip of them with fingers moistened in water and the sound is beautiful. I've seen water used in other instruments too but can remember the details.

Best regards

mooman