mounted, a record where tunefulness plays as central a role as on any Backstreet Boys hit. "I'm just trying to find a decent melody," Bono sings with soulful patience in "Stuck in a Moment You Can't Get Out Of," "a song that I can sing in my own company."

Since they shot out of Ireland in 1980, U2 have believed that pop could sing like angels and move like the devil. They have always known devoutly that studio style facilitates meaning. It's why they have always seemed so modern -- this conviction that their sonic play of shades, textures, levels and dissolves amounts to more than an end in itself. This belief has always loomed enormously for U2, from the beat-oriented hummable songs of their first albums, which warmed up New Wave's chilly airs, to the largesse of their War-period arena performances, to their engagement with the geniuses of U.S. roots music, through to their itchy recastings, on Achtung Baby, of transcontinental love and panic. This restlessness reached a high point in 1997, when U2 released Pop, an album dipped in club music and dead set on ironic kicks.

Now, after spending twenty years pushing different styles through the roof, on All That You Can't Leave Behind they table everything except that which now seems most crucial: the songs themselves. All That You Can't Leave Behind flexes with an interior fire. Every track -- whether reflective but swinging, like "Wild Honey," or poised, then pouncing, like "Beautiful Day" -- honors a tune so refined that each seems like some durable old number. Because this is U2, there's a quick impact to these melodies, yet each song has a resonance that doesn't fade with repeated listening.

The melodies mirror the album's production, which is carried off with seeming invisibility by seasoned U2 hands Daniel Lanois and Brian Eno, with Steve Lillywhite showing up for a few mixes. Everything coheres in a kind of classically U2 sonic clench: "Walk On" addresses perseverance and reward in its lyrics, but the song is really about its minor-key dance of guitars and rhythms, vocal yearning and hope. "Kite" is about the plight of a fraying couple; when Bono glimpses "the shadow behind your eyes," his lyric evokes the music's slanted conversations of melody and rhythm and guitar figures. Bono's singing has lost some of the extra flamboyance it's had in the past, but it's as passionate as ever -- by reining himse