H2Orchestra performing for National Capital Commission, Ottawa from Steve Mann on Vimeo.
Although water has been used to make music for many centuries, (ancient Greek and Roman water organs, Handel's water music, etc.), the hydraulophone is the first musical instrument to make musical notes directly from the sounds of water.
The water organ and hydraulis of ancient times made sound from air, using water merely as a source of power to push air across a fipple mechanism or through some other kind of aerophone.
H2Orchestra uses hydraulophones, which are instruments in which the sound originates from turbulence and vortex-shedding phenomena of water itself.
Dihydrogen monoxide (H2O) actually exists in various other states-of-matter or phases, such as ice (solid), and steam (vapour, gas).
H2Orchestra.pdf, a document
describing us in more detail...