NASHVILLE The Foundation, the major-label debut of the Zac Brown Band, was something special with more than 2 million copies sold and four No. 1 country singles.

Zac Brown says that was nothing compared to what's on the way.

The Atlanta band will release it's highly anticipated new studio album, You Get What You Give, on Sept. 21, and Brown said it's "going to be amazing."

"Every step of it's done the right way and I expect people are really going to love this record and see the depth of our musicianship," Brown said Saturday in a phone interview from New York City, where the band was opening for the Dave Matthews Band. "We're always growing. Not that we've arrived at any grand finale or anything, but the progress from this last record to this one, it's tremendous and I'm proud of it."

The Foundation remains at No. 2 on the Billboard country albums chart 86 weeks into its release. During the album's slow ride to the top based on the strength of songs like Toes and Chicken-Fried and a live show hailed in all quarters, the band has slowly gained a reputation for genre-defying music. The group won the Grammy for best new artist this year.

Brown promised You Get What You Give will take that rep to a new level. He said there's a helping of country radio-friendly tunes among the album's 15 tracks. But the band also explores its other influences. There's a little Texas swing, some jam-band jams and lots of harmony along the lines of Crosby, Stills Nash and Young and The Eagles. The Allman Brothers Band was an influence as well.

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