William Zeitler is an international composer for film and concert ensembles/orchestras, an accomplished organist, pianist and harpsichordist (B.F.A. from Cal-Arts), and one of the few professional players in the world on the ‘glass armonica’ — an instrument invented by Ben­jamin Franklin for which Mozart and Beethoven composed. (It works on the ‘wet finger around the wine glass’ idea). William has performed on the glass armonica internationally, including at the Kennedy Center in Washington, DC, with the Blue Man Group at the Hollywood Bowl, and on film scores such as HBO’s Taking Chance. The hour-long documentary Entre Marte & Svalbard (Between Mars & Svalbard) for which William composed the film score aired on RPT2 (the Portuguese equivalent of PBS). In 2013 William published the first book-length history of the glass armonica, a project requiring 14 years of research – the book contains extensive translations into English for the first time of significant documents in the history of the glass armonica from their original Latin, French, and German sources. And William's hands playing the glass armonica were a clue on Jeopardy!