“The Red Rooster” is track nine on disc one. Listen to it first, because it’s the key to this re-issue. On it, Howlin’ Wolf schools Eric Clapton on how to play the blues. As in, “No man, do it this ...

Director Don McGlynn has been in the business of making heartfelt, low-budget documentaries of important but marginalized musicians for 20 years now. Performers such as Art Pepper, Charles Mingus and ...