By the spring of 1968, the Grateful Dead were still a genuinely dangerous band — dangerous in the best sense, meaning no one, including the musicians themselves, could predict where a given night might land. The classic quintet of Jerry Garcia, Bob Weir, Phil Lesh, Bill Kreutzmann, and Ron "Pigpen" McKernan was fully intact and operating at a level of collective improvisation that had few peers anywhere in American music. Their debut album was barely a year old, and Anthem of the Sun was still being assembled, with some of its live source material drawn from performances not entirely unlike this one. These were the acid tests made permanent, the Haight-Ashbury scene's musical id rendered in tape hiss and feedback. The Carousel Ballroom itself is one of the great footnotes in San Francisco rock history — and not merely a footnote. Located at the corner of Market and Van Ness, the room would soon be rechristened Fillmore West by Bill Graham later that year, but in the first months of 1968 it was operated by a collective that included the Dead, the Jefferson Airplane, and Quicksilver Messenger Service. Playing the Carousel was, for the Dead, playing their own house. The room had the loose, communal energy of a space the band felt proprietary about, and that comfort translated directly into the willingness to stretch out and get weird.
The one song we have documented from this date is Caution (Do Not Stop On Tracks), and if you know the song, you already understand why it matters. Rooted in Pigpen's raw blues authority, Caution was one of the great psychedelic launching pads of the early Dead — a slow-building, hypnotic vamp that could absorb twenty or thirty minutes of pure sonic exploration without losing its center. Pigpen would prowl through the verses, half-preaching, half-howling, and then the band would simply dissolve the structure and follow Garcia into whatever came next. In 1968, there was nothing polished about it, and that was entirely the point. The guitar interplay between Garcia and the rhythm section in these early Caution performances could get genuinely unsettling, in the most rewarding way. Recordings from the Carousel era tend to be audience captures of variable fidelity, so manage expectations accordingly — but even a rough tape of the Dead in this room, in this year, is a document worth sitting with. Put on headphones, give it time, and let it find you.