Rock supergroup Audioslave found making its newly released sophomore album, "Out of Exile," much easier than its self-titled 2002 debut.

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"Everyone is growing up, becoming an older person," explains singer Chris Cornell. "We all had problems and difficulties in previous bands that we would've had if we were in Audioslave 10 years ago with each other.

"Now we've all come to the same conclusion that we want to do this and enjoy doing it, and we don't get involved in petty ego issues. If we have a problem, we work it out immediately."

Cornell was previously in the band Soundgarden, while his three Audioslave mates came from Rage Against the Machine. The "Audioslave" album was a double-platinum success produced by Rick Rubin, who also helmed "Out of Exile."

Audioslave starts a European tour next week in Lisbon, Portugal, and will be touring North America later in the summer.