Tamalpais Research Institute (TRI Studios) is the state-of-art musical playground that Bob Weir built and resides in when he’s not on the road touring. Digging deep through the TRI archive, will pay dividends.
This video showcases a Bob Weir who may be all gray, but sings and plays with the energy of a musician 40 years younger than him.
To the best of my research, this video is from a session in 2011. Watch Bob deliver a passionate acoustic version of the Grateful Dead classic “Black Throated Wind” in HD, up close and personal.