It's a paradox of our modern age that as we become more digitally connected, we also seem to become more socially isolated. That phenomenon is a central theme on The Phosphorescent Blues, the new album from New York folk/bluegrass group Punch Brothers. Opening with the fittingly titled "Familiarity," The Phosphorescent Blues explores how we can build real relationships with people when it seems like life is all about scrolling mindlessly on a phone. And the sound of the album effectively supports that idea; delicate, spare songs—made with various acoustic stringed instruments and warm vocal harmonies—like "Mint Julep" are invitations to slow down for a minute and take in the music. All that stuff about connecting with people wasn't just talk, either; closing song "Little Lights" features a choir of Punch Brothers' own fans, who submitted recordings of their singing after the band put out a call through social media. Gabriel Kahane will open. (Kolbie Stonehocker)