the irrefutable beauty the band's fans anticipated. What happened?

Initially, U2's decision to abandon the pop-conscious ministrations of its previous producers, Steve Lillywhite and Jimmy Iovine, and to hire instead the veteran experimentalist Brian Eno and his current collaborator, Canadian producer Daniel Lanois, seemed not only interesting but also admirably consistent with the band's vaunted idealism. The four members felt artistically constricted by their chart-tested monster-guitar format; the right producer – somebody with serious art credentials – would understand their impasse, would be able to help them grow. It sounded like a brave gamble: art over gold.

But idealism is not art. As a producer – as opposed to a producer-songwriter, the role he played with Talking Heads – Eno is most valuable as a conceptual organizer and sonic strategist, a master of atmospheres. But with guitarist Dave "the Edge" Evans churning out squalls of postpsychedelic ambiance, U2 already had more atmosphere than it really knew what to do with. In that narrow regard, Eno was an unnecessary addition to the team.

A more serious problem was the band's conceptual shortcomings. Like the German producer Conny Plank, another post-Spectorian studio auteur (who was also considered for this project), Eno is able to express his own ideas through the artists he produces (or processes). But short of cowriting songs, he cannot supply the musicians' art. And what all his masterful marshaling of tribal-style chants, ethnoramic percussion and lush electronic sounds often serves to reveal here, dismayingly enough, is a creative vacuum where the band should be. The album sounds formless and uninhabited.

Actually, that's not entirely true. Singer Bono is certainly at home here – as well he should be, given that his vocals are way out in front in the mix. Lacking consistently strong, well-defined material, the producers attempt to create dynamic tension in the tracks by focusing on discrete musical elements: the rich tone of Adam Clayton's bass, the hypnotic possibilities of Larry Mullen's drum patterns, the subtle symphonic swell of Eno's own synthesizer. And in the process they chop Evans' roaring guitar style into inventive snippets, enriching the mix but draining the band of its fundamental source of power, Bono tries to make up for that loss. His stentorian be