Vanguard Records is surveying its vaults for a three-disc, 45-track collection dubbed "Vanguard: Roots of Blues." Due Tuesday (Sept. 17), the compilation taps the renowned label's recordings of the Ne

Vanguard Records is surveying its vaults for a three-disc, 45-track collection dubbed "Vanguard: Roots of Blues." Due Tuesday (Sept. 17), the compilation taps the renowned label's recordings of the Newport Folk Festival throughout the 1960s, as well as the substantial roster of blues artists who have recorded for Vanguard through the years.

The first disc shows the merger of the label's two specialties -- folk and blues. Among those represented are Odetta, Dave Van Ronk, and John Hammond, all of whom dipped into the blues tradition as they developed their careers as folk artists. Disc two is reserved for the delta and country blues performed by such icons as Mississippi John Hurt, Bukka White, Skip James, and Muddy Waters. Finally, disc three centers on the urban blues of Junior Wells, Otis Rush, Buddy Guy, and others who embraced electric music.

The set follows just a month after the release of "Vanguard: Roots of Folk." Along with folk legends such as Joan Baez and Phil Ochs, the third disc of that album also focused on the folk blues revival and tracks by Hammond, Van Ronk, James, Waters, and others.