Vinyl LP pressing. 2017 release. When Nonesuch Records celebrated it's 50th anniversary in 2014, with festivals at London's Barbican Centre and New York's Brooklyn Academy of Music (BAM), Kronos Quartet joined forces with four label mates - Sam Amidon, Olivia Chaney, Rhiannon Giddens, and Natalie Merchant - to perform a concert entitled Folk Songs. The group later recorded the songs, most of which are traditional with contemporary arrangements, with Doug Petty as the album's producer. The Kronos Quartet is an American string quartet based in San Francisco. They have been in existence with a rotating membership of musicians for over forty years. The quartet specializes in contemporary classical music, with more than 750 works having been written for them.