Particularly 2:17-36. So sweet! How exactly did he do it? It seems like maybe it has some studio compression happening, among other things. Blair Jackson's Grateful Dead Gear doesn't have anything on it (at least not when I just did a quick recheck of the index).
Did you check out the Workingman's studio outtakes dead.net is streaming?
https://www.dead.net/?eml=2020July5%2F5 ... id=6003535