Pitching in on the project are some high-profile guests, including Dr. John, Robert Randolph, Keb' Mo', Jim Keltner and Jeff Beck bassist Tal Wilkenfeld. "I'll say, loosely, I've started a blues album," Walsh said.

"Half of it is original, and half of it is old Howlin' Wolf or John Lee Hooker. I told everybody to bring a song in and everybody did, be it an old blues song or some idea. We went through some old Stax records from, like, the Otis Redding days, Sam & Dave stuff that were just albums tracks, and did our version of a whole bunch of stuff." Walsh added that he doesn't yet have a timeframe in mind for the album's release.