Richard Schiff made a good Jerry Wexler in “Ray,” playing the R&B fanatic record producer and Atlantic Records co-founder earlier in his career.

But Marc Maron’s take on him — the voice, the look (skinnier, yes), the “Do what the artist wants” deference, the flashes of temper — is something approaching definitive.

SOMEbody did his homework. Uncanny.

Granted, this is an arcane corner of music history, a pivotal figure R&B fans know of and few others do. But having interviewed Wexler a few times during his Siesta Key retirement, I felt I was watching the man in his prime in “Respect.”

So much “Respect” Marc Maron. Well done.