I am not a fan of Sound Art but what interests me in this area would be the ability of sound waves to move objects or substance.
This is an example of using sound waves to change the colour and height of the flames. This is resulted from the pressure variations from sound waves affecting the flow rate of the gas.
I think that it would be a really interesting sight and sound experience should they combine it with popular songs. Also, the use of water as a medium could be possible, and the sound waves could be seen through the ‘jumping’ of the water.