A man sits in a chair in the middle of a concert hall, perfectly still and dressed tastefully in a suit and tie. He is somewhat anonymous looking, as if he could have been pulled off an urban sidewalk and plopped in this seat, surrounded by a veritable orchestra of percussion instruments. Timpani, gongs, bass and snare drums and cymbals are strewn about, seemingly without performers to bring them to life. Out of nowhere, thunderous bass sounds bring these instruments into vibratory oscillation, their sonic activity spreading around the space in an ever-morphing wash of sound. The man sits calmly at the center, almost beatific. His eyes are closed as he listens to this remarkable spectral orchestra, which, as it turns out, is being played by his brain.