In the 15-plus years since Sam Beam released his debut album as Iron & Wine, the singer-songwriter has added layer upon layer to his soft-spoken sound. Once a purveyor of whispered home recordings, Beam began collaborating with other bands and singers — Calexico first, followed later by Jesca Hoop and Band of Horses' Ben Bridwell — and expanding Iron & Wine's increasingly dense approach in order to encompass intricate percussion and blaring horns.

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