What foundational knowledge would I need to participate in a blues jam as a bassist? I know the blues scale but that’s about it. Completely unfamiliar with the musician side of the genre. I’ve heard plenty of blues growing up but I’ve never really explored if musically.
Just to absorb it, to get familiar with the fundamentals, while it’s not the whole story, the Chess Records catalog of artists would be a one stop shopping destination initially. Muddy Waters, Howlin’ Wolf, Willie Dixon, Little Walter, Sonny Boy Williamson II, and so on. That also includes many at the ground floor of rock’n’roll…Chuck Berry, Bo Diddley…all the stuff that British and American rock bands appropriated/ripped off.
There are others, like Otis Rush, Magic Sam, Elmore James, Buddy Guy, John Lee Hooker, even earlier performers on the cusp of electricity like Big Boy Crudup. You should certainly work backwards into pre-war acoustic blues, and that’s a whole different realm, however the unavoidable figure would be Robert Johnson, with Charlie Patton before him.
As for
what to play, just listen to riffs, basslines (whenever present)and chord changes. Walking technique is important. Try playing along with that. Just the riff from Wolf’s “Killing Floor” can be heard in countless songs.
There’s more ‘modern’(in that context) material to listen to, BB King, Johnny Guitar Watson, T-Bone Walker, and Ray Charles for example, that had a horn/swing flavor; Charles in particular would introduce you to ‘gospel changes’ injected into his bluesy material. Albert King and Freddie King drifted into 60’s soul music motifs.
Then there’s the entirety of New Orleans music…Prof. Longhair, Toussaint, and the Neville family.
You don’t have to immerse yourself in it all, just be conversant.