Emmylou Harris, who was presented with an ACM Honors Pioneer Award this week, joins English folk rock quartet Mumford & Sons for CMT Crossroads, premiering tonight on CMT. The show explores the roots of country music by pairing country artists with musicians from other genres. Marcus Mumford tells the AP: "Pretty much every song that Emmylou has sung on is my favorite song of whichever artist she sang with." Watch a preview of the episode here.

Punch Brothers, who launch their North American tour in Montreal tonight, are celebrating the occasion by offering a free download of three songs recorded live at The Fillmore in San Francisco, including their songs "New York City" and "Don't Get Married Without Me" and Chris Thile's "Song for a Young Queen." The New Yorker's Alec Wilkinson, who will be chatting with the band at The New Yorker Festival on October 5, says that each band member "plays with grace, thoughtfulness, and force to a degree that is not duplicated by any band I am aware of."

Nonesuch released composer Jonny Greenwood’s soundtrack to Paul Thomas Anderson’s new film The Master in the US on September 11 to critical acclaim, with The New Yorker calling the score "rich and inventive" and Rolling Stone saying the film's "visual poetry is matched by Jonny Greenwood's haunting, hypnotic score." Nonesuch will release the album on vinyl on October 22. The LP includes 12 tracks pressed on 140-gram vinyl plus the full album on CD. It is now available to pre-order in the Nonesuch Store.

The Art of Instrumentation: Homage to Glenn Gould, by violinist Gidon Kremer and his Kremerata Baltica chamber orchestra, is out today, September 25, 2012, which would have been Gould’s 80th birthday. The album comprises 11 pieces and arrangements by contemporary composers that quote from or are inspired by works, mostly by Bach, that Gould famously recorded during his career; two Arnold Schoenberg pieces also are drawn upon in one piece. Says the CBC: "The result is a haunting, highly personal homage from one great musician to another and a deeply affecting tribute to Gould's enduring genius."

Lianne La Havas is the guest on today's episode of WNYC's Soundcheck. She recently stopped by the WNYC studios to perform live solo takes on three songs off her debut album, Is Your Love Big Enough?—"Age," "Forget," and "No Room for Doubt"—and talk with Soundcheck host John Schaefer about the album, her musical influences, and the inspiration behind the songs. Tune in to 93.9 FM WNYC tonight or listen to the complete episode here.

Jessica Lea Mayfield will tour in the US this November and December in support of her highly acclaimed Nonesuch Records debut album, Tell Me, playing with her brother David Mayfield on their Sibling Rivalry Tour. Growing up in Kent, Ohio, the Mayfields were surrounded by bluegrass and folk music; both David and Jessica first performed with their family band One Way Rider, traveling across the country in a 1956 tour bus once belonging to Bill Monroe, Kitty Wells, and Ernest Tubb.

Dr. John, who spent the spring and summer on tour following the release of his acclaimed new album, Locked Down, is set to hit the road again this fall, this time with a four-piece band and The Blind Boys of Alabama for the Spirituals to Funk tour. Based on the legendary Carnegie Hall Spirituals to Swing concerts of the 1930s, Spirituals to Funk features an integrated show that explores the connections between jazz, blues, and gospel, all under Dr. John's musical direction. The tour will visit 30 cities and towns in 14 states across the US, from October 10 to November 18.

Fatoumata Diawara kicks off her US tour, featuring music from her debut album, Fatou, at the Cityfolk Festival in Dayton, Ohio, tonight, followed by stops in Bloomington, Chicago, New York City, Boston, Washington, DC, New Hampshire, and North Carolina. Her new album is "a joyous mix of vibrant songs about love, politics and empowerment," says the Chicago Sun-Times. "Fatou is a rare gift of a record for fans of African pop, female vocalists and generally outstanding music," raves PopMatters. "Prepare to be smitten." Diawara has just been nominated for a MOBO Award for Best African Act.

The Brad Mehldau Trio’s new album, Where Do You Start, a companion disc to this spring’s critically acclaimed Ode, is out now. The new album, featuring interpretations of ten tunes by other composers plus one Mehldau original, earns four stars from the Guardian, Independent on Sunday, Times of London, and Daily Telegraph, and five stars from the Financial Times, which says the Trio gives "an adventurous sheen to modern jazz." NPR's Fresh Air says: "The pianist builds his improvisation like a master storyteller." The BBC finds Mehldau "entering a new prime phase in his career."

Randy Newman’s new song, “I’m Dreaming,” is available as a free download here, where you can also watch the accompanying video. With lyrics from the viewpoint of a voter who casts his ballot solely based on skin color, the song draws attention to something Newman has noticed and written about for 40 years: racism in America. (The complete lyrics are here as well.) While the song, which Newman performs solo at the piano, is free, anyone wishing to contribute is encouraged to donate to the United Negro College Fund.

Lianne La Havas—who has just been nominated for the Best Newcomer Award at this year's MOBO Awards—made her US television debut with a performance on The Late Late Show with Craig Ferguson last night on CBS. She performed the song "Age," off her debut album, Is Your Love Big Enough?. Watch it here. La Havas is back home in the UK to tour and will return to the US at the end of October for a tour supporting John Legend.

Punch Brothers have announced a 2013 New Year's Eve Three-Night Extravaganza to take place at the Bowery Ballroom in NYC, December 29–31. In addition to single show tickets, there are three-night passes available, which include a limited-edition silkscreen poster. A limited pre-sale is underway now. The shows will come at the end of a three-month international tour that includes stops at venues across North America, Europe, and the UK; a New Yorker Festival event; ACL Festival set; and much more.