The set & projection design are two of the few good things in "The Tallest Tree in the Forest." Photo by Craig Schwartz.

Unfortunately, “The Tallest Tree in the Forest,” now playing at the Mark Taper Forum in downtown L.A., is not an interesting way of telling Robeson’s story.

Daniel Beaty’s one-man show recounts the life of Paul Robeson, who is best known to many as the man who sang “Ol’ Man River” in the movie version of "Show Boat." Throughout his life, Robeson tried to toe the line between being accepted by the white community and being a good representative for the black community, a struggle that continued for the duration of his time in the public eye.

Robeson was an awe-inspiring performer, who led a compelling and conflicted life (indeed, the program’s bio of the man is a worthwhile read). Unfortunately, Beaty, who both stars in and wrote the show, doesn’t communicate that well. While it’s difficult to fill Robeson’s shoes, Beaty falls short. A variety of factors figure into this, from a critical lack of sung diction (which renders the show’s 15 songs nearly unintelligible) to failure to effectively embody the show’s various characters. Beaty puts a lot of effort into the show, but the final product is rather lackluster, and could use further finessing from director Moisés Kaufman.

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Derek McLane’s set is, as always, quite good, and pairs nicely with John Narun’s projection design to reflect the first half of the twentieth century and highlight certain aspects of Robeson’s life. David Lander’s lighting design contends with the haze to add to the show’s atmosphere.

Paul Robeson’s life story is interesting, important, and not well known, but “The Tallest Tree in the Forest” is not a compelling way to learn about him.

“The Tallest Tree in the Forest” plays at the Mark Taper Forum (135. N Grand Ave., Los Angeles) through May 25. Tickets are $20-$70. For more information, visit CenterTheatreGroup.org.

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