Dr. John passed away last June, but his music just keeps coming. Two significant releases have been issued posthumously and these may only be the tip of the iceberg, since there are so many live recordings that remain in various vaults. We are unlikely to hear all of it, though an archived release project a la The Grateful Dead, Frank Zappa, Bob Dylan and Allman Brothers is not out of the question.

Mac’s lifelong friend and former manager Stanley Chaisson is responsible for two posthumous ...