Mandolin god Chris Thile - former and current leader of Nickel Creek and the Punch Brothers, respectively - is generally known for kicking bluegrass forward: Check out his down-home covers of Radiohead’s "Morning Bell" and Pavement's "Spit On A Stranger." This ridiculously blazing set with hot-shit Brooklyn guitarist Michael Daves, recorded at Jack White's Third Man studio in Nashville (where they also cut a 7" single with White, "Man In The Middle/Blue Night"), focuses instead on old timey material by Bill Monroe, Lester Flatt, and others. Dusty museum pieces they’re not: The uptempo jams are wild-picking shred fests, and the ballads cut deep. On a soulful reading of the traditional "Rain and Snow" (a Grateful Dead staple), the pair’s high lonesome harmonies are hollered up like pleas from the depths of a coal mine. That’s a place these city-slickers have probably never been. But no doubt they understand the rock-bottom blues.

Listen to "Rabbit in the Log":

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“Ambling Alp”

The "Ambling Alp" was the nickname of the six-and-a-half-foot-tall Primo Carnera. Though the song is named after the Italian-born 1930s heavyweight champion, Yeasayer are actually paying tribute to boxing legend Joe Louis with this first-person psychedelic dance-rock tune. “I was always interested in writing a song that had boxing mythology in it,” Yeasayer’s Chris Keating said. “It’s pretty fascinating: There were so many amazing characters, and it was so closely entwined with 20th century history.” Yeaseyer also invokes German champ Max Schmeling and hints at the historical significance placed on the historic bouts between the Nazi-era boxer and the African-American Louis.