Maxime Rioux (born October 29, 1959) known by his stage name Maxime De La Rochefoucauld is a Canadian musician and performance artist based in Montreal, Quebec. Rioux is best known for his compositions produced on musical instruments that are homemade and often built specifically for a single live performance. Most instruments (usually string or percussion) of his Système Ki, as Rioux calls it, are not played directly by a musician. Instead they are mechanically linked to a woofer that is driven by an inaudible, extremely low frequency electrical signal. The signal, in the range of 1-10 Hz Source: Wikipedia, CC BY-SA
