By the spring of 1982, the Grateful Dead were deep into what longtime fans sometimes call the "Garcia and Weir with keyboards" era — Brent Mydland had been in the band for three years now, and his Hammond organ and muscular piano playing had thoroughly reshaped the band's sonic identity since replacing Keith Godchaux in 1979. The lineup was settled and road-hardened: Garcia, Weir, Lesh, Hart, Kreutzmann, and Mydland, a unit that could swing between tender balladry and full-throttle improvisation with genuine authority. The early eighties weren't the most celebrated chapter of the Dead's story — they'd put out "Go to Heaven" in 1980 and were still finding their footing in the arena-rock landscape — but the band was playing with real fire on the right nights, and that fire was often most visible in the second set. Moscone Convention Center is not your typical Dead venue. Built in 1981 and best known as San Francisco's premier trade show and convention hall, it's a massive, multi-purpose civic space rather than a concert room with natural warmth or intimacy. Playing in their own backyard, though, had a way of loosening the band up — the Bay Area crowd knew every signal, and the Dead tended to respond to that familiarity with something a little looser and more exploratory.
What we have from this show points toward a memorable second-set stretch. "Turn On Your Lovelight" is one of those songs that reminds you the Dead were, at root, a blues and R&B band — a Pigpen showcase originally, carried forward into the band's later decades as a communal, joyous blowout that could swallow twenty minutes whole. By 1982, with Brent handling much of the vocal and keyboard duties on the tune, it had a different flavor than the Pigpen years, but it retained that loose, crowd-engaging energy. Hearing it roll into Drums and whatever open improvisation followed is a classic late-night move, the kind of sequence that separated Dead shows from anything else happening in American rock at the time. Listen for the way the rhythm section locks in on "Lovelight" — Hart and Kreutzmann could turn that groove into something almost hypnotic — and pay attention to how the energy crests before the percussion section takes over and dissolves into pure texture. Recording details for this one are limited, so temper your expectations on fidelity, but don't let that stop you from dropping the needle on a genuine piece of San Francisco rock history.