Last September we posted about a number of Grateful Dead covers played by John Mayer over the course of his summer tour. Apparently John is still head-over-heels for the San Francisco icons as yesterday he tweeted a few tweets singing the praises of the Dead.

Here’s what John had to say yesterday:

The Dead…5/19/77, Scarlet Begonias. It’s a 12 minute answer to the question “what was so special about The Grateful Dead?” — John Mayer (@JohnMayer) August 14, 2014

The Dead wasn’t a band, they were the raw material that you make bands out of. — John Mayer (@JohnMayer) August 14, 2014

The Dead were more than a band. They were a musical think tank. An investigation and an endeavor, a work study in American music. — John Mayer (@JohnMayer) August 14, 2014

We couldn’t agree more! Wondering what that “Scarlet” Mayer mentions is all about? All of the Grateful Dead’s May 19, 1977 performance from Atlanta’s Fox Theatre was released as Dick’s Picks Vol. 29. You can stream the show via Spotify:

Correction: Both ourselves and Mr. Mayer referred to this “Scarlet” as from May 19, 1977; but the version on Dick’s Picks Vol. 29 is actually from May 21, 1977 in Lakeland, FL. Both shows are featured on Dick’s Picks Vol. 29 as well as bonus tracks from October 11, 1977.