In their most starry-eyed moments, partisans of Coldplay have envisioned the English band as a successor to U2's throne. Well, the group has taken at least a small step in that direction.

The first single from new album "Viva la Vida or Death and All His Friends," released to radio and, for one week, as a free download on Coldplay's Web site on April 29, is "Violet Hill," and while one track might not define the entire album, this one does send a signal that the group has broken out of an increasingly confining formula.

"Violet Hill" opens with an orchestral/electronic mass, a meditative moment that's interrupted suddenly — almost abruptly — by Chris Martin singing an ominous line: "Was a long and dark December/ From the rooftops I remember there was snow, white snow."

Martin's everyman British voice is familiar, but it has a slightly different quality here, a twangy intonation and more biting attack. The guitar and rhythm section quickly rush in with a thick, almost sloppy sound and insistent, loping beat.

The effect is miles away from the polished, piano-based arrangements that made Coldplay one of the biggest bands in pop music earlier this decade.

But it was the emotion and urgency of its first two albums that positioned the London quartet as more than a huge-selling pop group. There was a sense of connection and inspiration.

Their third album, "X&Y," was plagued by uncertainty and false starts, and when it came out in 2005 it didn't find the same level of sales or acclaim.

The new CD comes out June 17. It was co-produced by Brian Eno, a principal player in U2's studio team.

Hiring Eno apparently helped, assuming he and co-producers Markus Dravs and Rik Sampson were involved in designing the harder sound and coaxing the free-spirited performance.

But Martin also sounds more urgently involved as a singer and lyricist, conjuring a vivid yet elusive landscape of social upheaval.

Military and religious imagery entwine in the song, which evokes that wintry hell "when banks became cathedrals" and "priests clutched onto Bibles hollowed out to fill their rifles."

Artistically and in terms of response, it's a promising return. Maybe Coldplay has found what it was looking for.