When the most exciting producer in pop music himself puts out a CD, the thrill is in the discovery: The world may have already suspected that Justin Timberlake, Nelly Furtado, and a small army of other singers owed 75% of their fame to the stockpile of skittering beats Timbaland built and then graciously set them upon, but here's a chance to prove it. Or it might have been in less welcoming hands. Shock Value is a far-reaching and ambitious disc; a masterpiece, even, in its own way. But it's not at all self-centered. If there's a point being put across here, it's that Timbaland came by your vote as behind-the-scenes musical man of the hour honestly: pair him with Fall Out Boy or the Strokes, and he will not only provide tracks that surprise you by maintaining their rock 'n' roll integrity, he will also convince you that shimmer's role in rock music has, to now, been tragically misguided and miniscule. Re-team him with Timberlake and Furtado (for the near-flawless track "Give It to Me") and he will again trade vocal bites, but they will still be nibbly, not voracious. In a CD full of experiments and puzzles (why is Elton John just piano-playing, not singing? And how did the L.A. band One Republic end up on this disc?) a single truth emerges: Timbaland's taste is impeccable, but his judgment is even better. Shock Value, by virtue of its swirly beats and mesmerizing rhythms, will bring him a smidge closer to the spotlight. But because it's a disc of collaborations, he'll retain the shadowy-genius reputation that precedes him, and that he so richly deserves. --Tammy La Gorce

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