Imagine a world with no inconsistencies or imperfections. Where timeliness plus ef?ciency equals productivity, and everything is in working order. ... Now, imagine a world with no music. Welcome to Extropia. Foster, a citizen of Extropia, is like any other... his teeth are hard. His tongue is pink-- but not too pink. He has the right amount of body hair. But something is very wrong. Foster is in a state. He can hear "too well". Sounds--everyday sounds, are coming together, falling into cacophonous, magnificent order in his head.