To a certain degree, any performance by Crosby, Stills and Nash is like Déjá Vu all over again. That's because that 1970 landmark album — with Neil Young also aboard — along with the first CS&N album from the year before essentially provided the soundtrack for a particularly turbulent time of war and an ideologically divided country. The group's close vocal harmonies (stunning when on, but notorious for drifting off-key live), haunting folk-rock melodies, occasional guitar lacerations from Stephen Stills (and Young), and lyrical grapplings with the socio-political upheavals of the era made the band essential listening. The members have carried on through a sometimes fractious relationship, and have a new live album just out, perhaps fueled by David Crosby's prescient "Long Time Gone" lyrics: It's still imperative to speak out against the madness because it remains a long time before the dawn.
Mon., Aug. 6, 7:30 p.m., 2012