On a good day, film soundtracks enhance the moviegoing experience. At their best, they transcend it. The latest sonic accompaniment to Twilight's inescapable teen-vampire juggernaut — a swooning conveyance of girl-meets-undead-boy romance, delivered by some of the best established and emerging names in the indie stratosphere — may sway even the most committed Twi-loathers.

After the success of the first installment, music supervisor Alexandra Patsavas (Gossip Girl, Grey's Anatomy) gets her pick of the alt litter here, with each contributing original, previously unreleased material: From the opening chords of Death Cab for Cutie's dusky guitar rapture ''Meet Me on the Equinox'' to the spooky robot-ennui of Thom Yorke's ''Hearing Damage'' 
 and Grizzly Bear's gorgeous folk-pop pastoral ''Slow Life,'' New Moon rarely falters. A peacocking remix of Muse's shamelessly operatic ''I Belong to You'' becomes a Bowie-esque glam-rock stomper. In its wake, Bon Iver and St. Vincent quietly unfurl ''Rosyln,'' a duet of hushed, almost church-like beauty.

Moon (due in stores Oct. 20) yields several happy revelations from its lower-marquee names: Nordic songstress Lykke Li's nearly a cappella ''Possibility'' is a lovely little Swedish snowflake, and jokey rockers OK Go achieve an impressive sort of Flaming Lips-y quirk-gravitas on the sprawling, cinematic ''Shooting the Moon.'' Black Rebel Motorcycle Club's acoustic campfire lament ''Done All Wrong'' segues seamlessly into the jaunty, Strokes-ian guitar fuzz of Hurricane Bells' ''Monsters.'' Think of New Moon as a sort of survey course in new-now-next rock: a mixtape with teeth. A