Starting on the evening of September 15, you'll hear it as you approach West 25th Street, coming from under the High Line: womp, womp womp. It's a little bit fore'boding--the sort of low-frequency pulsations that signal zombies in movies and sent Jodie Foster alien-hunting in Contact. It plays on a loop, intercut with other baritone noises. It's not a soundtrack that's characteristic of the galleries, car-repair shops, and luxury condos of West Chelsea (though there are lots of subwoofer-equipped nightclubs nearby). It's certainly not the polyethnic pop we have come to expect from David Byrne.