Hardly Strictly Bluegrass, the free outdoor music festival held in San Francisco's Golden Gate Park, celebrates its 10th anniversary this year with a stellar line-up of performers that includes a number of Nonesuch artists—Carolina Chocolate Drops, Randy Newman, Emmylou Harris, and T Bone Burnett—along with several artists familiar to fans of Nonesuch. The festival will be held October 1–3.

Kronos Quartet performed at the Cabrillo Festival over the weekend in a concert that led the San Jose Mercury News to exclaim: "With its charisma and chops, its taste and unflagging sense of mission, Kronos just keeps getting better. After 30-plus years, Kronos is tops, as it showed Sunday night." Kronos Quartet next performs a free concert at New York's Damrosch Park Bandshell Friday for the Lincoln Center Out of Doors series.

AfroCubism—the great world music album that never was—has finally been realized and is due for release from World Circuit / Nonesuch Records this October. To coincide with the release of the album, AfroCubism the band, featuring some of Cuba and Mali's finest musicians, will embark on its first full tour this fall. In North America, where the album is due for release on Nonesuch October 19, the group will stop in Montreal, Boston, and New York.

The Black Keys continue to play for sold-out crowds across North America. USA Today includes the band's Lollapalooza set of songs "from their terrific new Brothers album" among the festival's highlights. Time Out says, "The Black Keys sound like contenders these days, even champions." The Toronto Sun says the band delivered "some seriously solid vibes" in that city; Brothers "is practically guaranteed to end up in every critic's Top 10 year end poll."

Natalie Merchant, Carolina Chocolate Drops, and Rokia Traoré performed recently at the 45th annual Cambridge Folk Festival in Cambridge, England. BBC Radio 2's festival highlights program features interviews and live performances by all three both artists. Press coverage of the festival included praise for the performances.

The Low Anthem and Punch Brothers recently performed at the legendary Newport Folk Festival; both bands' sets were streamed live in full on NPR.org. The Low Anthem's home state performance garnered great reviews, including one from the Boston Globe, which wrote that a "fiery spirit imbued the Low Anthem’s set earlier on the same stage, with the Providence band once again proving its quick ascent was warranted." In their review of the festival, American Songwriter magazine called Punch Brothers' set "a deft fusion of old and new."

The Black Keys played the Bank of America Pavilion in Boston over the weekend, and the Boston Globe called the show "a searingly superb 85-minute set." In his review, Jonathan Perry describes the band's style as a "sizzling fusion of hill-country blues and indie-rock attitude." The Boston Herald, too, complimented the show: "In the best of ways, The Black Keys can make a multimillion-dollar venue sound like a dive-bar stage." The video for "Tighten Up" has been nominated for Best Breakthrough Video at MTV's Video Music Awards.

Steve Reich celebrates Drumming's 40th anniversary in Woodstock ... The Black Keys rock the East ... Carolina Chocolate Drops, Natalie Merchant, Rokia Traoré play Cambridge Folk Festival ... Christina Courtin joins NYC Gulf benefit ... Gidon Kremer, Kremerata Baltica  tour Europe ... Kronos Quartet takes in the BBQ at Rancho Nicasio ... The Low Anthem, Punch Brothers play Newport Folk Festival ... Stephen Sondheim is fêted at Ravinia, BBC Prom ... Sara Watkins opens for Ricky Skaggs in West Virginia ... and more ...

The Low Anthem and Punch Brothers are set to play the famed Newport Folk Festival this weekend. NPR will provide complete coverage of the weekend's events online at NPR.org. Newport Now describes The Low Anthem's live set as “a mix of ecstatic and contemplative energies.” Punch Brothers are also due to be featured on NPR's Weekend Edition Saturday.

Stephen Sondheim celebrated his 80th birthday in March in a Lincoln Center concert that will be broadcast on PBS this fall. The festivities continue this weekend as Sondheim is the focus of two concerts on the same day, nearly 4,000 miles apart: at the Ravinia Festival Pavilion outside Chicago and at London's Royal Albert Hall for BBC Proms Saturday night. Sondheim is the BBC Radio 3 Composer of the Week.

The Black Keys performed their second and third consecutive sold-out shows in New York City last night, at SummerStage in Central Park and at Terminal 5. The New York Times says: "At their best and starkest, they can make a growling riff feel loose and woozy, tempos fluctuating as if on a column of air." The New York Post says they "made an incredible amount of music for two guys who obviously know size doesn’t matter when it comes to the blues ... [T]he guys were unstoppable."

The 45th annual Cambridge Folk Festival gets under way tonight at Cherry Hinton Hall in Cambridge, England, and three Nonesuch artists are set to take the stage there this weekend: Natalie Merchant headlines Saturday night, Carolina Chocolate Drops perform both Saturday and Sunday, and Rokia Traoré performs on Sunday. BBC Radio 2 will broadcast highlights next Wednesday.