As a pilot project, the team produced a series of concerts at which audience members wore a version of the device. By manipulating their brain states, the spectators could influence the pitch and volume of synthesized instruments on stage. “We kept getting deeper and deeper into brain-wave technologies and what we could do with them,” Garten says. As they grew more ambitious—at points inventing a thought-controlled beer tap and levitating chair—the team formed InteraXon. For the 2010 Winter Olympics in Vancouver, they created an installation in which visitors could use a headset to control light displays on landmarks across the country, including Toronto’s CN Tower, Ottawa’s parliament buildings, and Niagara Falls, in real time.