Fermentophone - an instrument played by microbes

Fermentophone is part a musical instrument, part a scientific instrument, constructed by artist and professor Joshua Pablo Rosenstock, and played by the release of bubbles from live microbes (bacteria and yeast) fermenting foods and drinks. Rosenstock wanted to make "something unexpected and cool", as he told in Justine Dees blog interview, and, on a deeper level, to suggest that the microbes "may even control our thoughts and feelings in ways that we don’t totally understand".