“White folks don’t understand about the blues,” says the pioneering singer Ma Rainey, as imagined by August Wilson and incarnated by Viola Davis. “They hear it come out, but they don’t know how it got there. They don’t understand that that’s life’s way of talking.”

Albert Murray, the great 20th-century philosopher of the blues, put the matter more abstractly. The art of the music’s practitioners, he wrote, involves “confronting, acknowledging and contending with the infernal absurdities and ever-impending frustrations inherent in the nature of all existence by playing with the possibilities that are also there.”

“Ma Rainey’s Black Bottom,” Wilson’s 1984 play about a recording session in Chicago in the 1920s, both dramatizes and expresses that duality. Absurdities and frustrations abound, and the lethal, soul-crushing shadow of American racism falls across the musicians and their instruments. The specific and manifold evils of Southern Jim Crow repression and Northern economic exploitation are unavoidable. The members of Ma’s band swap stories of lynching, assault and humiliation, and Ma fights with the white owner of the record label (Jonny Coyne). By the end of the play — a swift hour and a half in George C. Wolfe’s screen adaptation — one man is dead and another has seen all his prospects evaporate.

But the sense of play and possibility, the joy and discipline of art, are also, emphatically, there. There in Ma’s big voice and smoldering, slow-rolling charisma. There in the tight swing of the players behind her — Cutler (Colman Domingo) on trombone; Toledo (Glynn Turman) on piano; Slow Drag (Michael Potts) on bass; and an ambitious upstart named Levee (Chadwick Boseman) on cornet. There in the voices and personalities of the actors: Turman’s gravelly wit; Domingo’s avuncular baritone; Boseman’s quicksilver; Davis’s brass. And there above all in the singular music of Wilson’s language, a vehicle for the delivery of vernacular poetry as durable and adaptable as the blues itself.

This version of “Ma Rainey’s Black Bottom,” on Netflix, is part of an ongoing project to bring all of Wilson’s plays — a cycle representing aspects of Black life in the 20th century — to the screen. That makes it, in some ways, definitive by default, part of an archive of preserved performances that will introduce future generations to the playwright’s essential work.

It’s also definitive because it will be hard, from now on, to imagine a Ma Rainey other than Davis, or a Levee to compare with Boseman. The rest of the cast is first-rate too, but those two carry the play’s meatiest, most complicated theme, and enact its central antagonism. Each character is an ambitious, inventive artist, and their inability to harmonize creates an undertone of tragedy that grows more insistent as the day wears on.

Ma, who rolls into the studio late, flanked by her nephew, Sylvester (Dusan Brown), and her young girlfriend, Dussie Mae (Taylour Paige), can seem almost like a caricature of the “difficult” artist. She insists that Sylvester, who stutters, record the spoken introduction to her signature song. She demands three bottles of Coca-Cola (“ice-cold”) before she will sing another note, and continually upbraids her nervous white manager (Jeremy Shamos). But this behavior isn’t the result of ego or whim. It’s the best way she has found of protecting the value of her gift, which once it becomes a commodity — a record — will enrich somebody else. The hard bargain she drives is the best deal she can get.

She also represents the old school — an established star who works in a Southern style that Levee thinks is behind the times. Part of the history embedded in the play is the story of the Great Migration of Black Southerners to the industrial cities of the North, and Levee suspects that his fleet, light-fingered approach to the blues will appeal to the tastes of the migrants, and also cross over to white record buyers. He epitomizes a different kind of artistic temperament as well — cocky, impulsive, tilting toward self-destruction. He argues with the other musicians, refusing to listen when they try to talk sense to him. He seduces Dussie Mae, a risky career move to say the least. He’s a young man in a hurry, eager to cash checks before they’ve been written.

Of course it’s hard to watch Levee — to marvel at Boseman’s lean and hungry dynamism — without feeling renewed shock and grief at Boseman’s death earlier this year. And though “Ma Rainey’s Black Bottom” has been around for a long while and will endure in the archive, the algorithm and the collective memory, there is something especially poignant about encountering it now.

Not because it’s timely in an obvious or literal way — the argument of Wilson’s oeuvre is that time to reckon with racism is always now, because Black lives have always mattered — but because of some unexpected emotional resonances. Wilson’s text is a study in perseverance, but it’s haunted by loss, and to encounter it at the end of 2020 is to feel the weight of accumulated absences.

Some are permanent and tragic, like losing Boseman at just 43. Others are, we hope, temporary. This is a rendering of a work written for the stage that begins with a concert — a sweaty, sensual spectacle of the blues in action. It’s also a movie that you’ll most likely encounter in your living room or on your laptop, further confounding an inevitable identity conundrum. Should we call this theater, cinema or television — or a sometimes graceful, sometimes clumsy hybrid of all three?

Maybe the question doesn’t matter, or maybe it will matter more once we regain our critical bearings and the theaters and nightclubs fill up again. But at the moment, “Ma Rainey’s Black Bottom” is a powerful and pungent reminder of the necessity of art, of its sometimes terrible costs and of the preciousness of the people, living and dead, with whom we share it. “Blues help you get out of bed in the morning,” Ma says. “You get up knowing you ain’t alone.”

Ma Rainey’s Black Bottom
Rated R. Running time: 1 hour 34 minutes. Watch on Netflix.