Composer Andrew McPherson has built what he calls a magnetic resonator piano - the strings are set vibrating by magnets suspended over them, rather than being struck by the hammers (though the latter option is also available). You can hear the result when Ryan MacEvoy McCullough plays Andrew’s Secrets of Antikythera at the Conservatory Theatre, Royal Conservatory of Music, Toronto, Ontario on Friday, October 21 at 8, and again on Monday, October 24th at the Franklin Theater of the Franklin Institute, 220 N. 20th St., in Philadelphia, also at 8.