The sources of that perfection are many, as explained by Noah Lefevre in the new, nearly 50-minute long Polyphonic video below on this “unreleased masterpiece,” whose origin and afterlife underscore how thoroughly Dylan inhabits the musical traditions from which he draws.
Like most major Dylan songs, “Blind Willie McTell” exists in several versions, but the one most listeners know (officially released in 1991, eight years after its recording) features Mark Knopfler on twelve-string guitar and Dylan himself on piano. Melodically based on the jazz standard “St. James Infirmary Blues” and named after a real, prolific musician from Georgia, its sparse music and lyrics manage to evoke a panoramic view encompassing the blues, the Bible, the ways of the old South, and indeed, the very history of American music and slavery. Though Dylan himself considered the song unfinished, he came around to see its value after hearing The Band work it into their show, and has by now performed it live himself more than 200 times — none, in adherence to the protean character of blues, folk, and jazz, quite the same as the last. --- [ed. Lyrics here.]
via: Open Culture: Why Bob Dylan’s Unreleased “Blind Willie McTell” Is Now Considered a Masterpiece