Baltimore singer-songwriter Marcus Brown makes amorphous R&B music under the name Nourished by Time. He’s headlining Chicago’s Lincoln Hall at 8 p.m. Monday, Sept. 22. Courtesy of Lauren Davis

Sophomore slumping has plenty of root causes, but the pop music proverb we often use to explain that unlucky dip feels wrong: You have your entire life to make your first record and only a year or two to make your second. Not really. Has anyone ever successfully squeezed the entirety of their existence into a debut album? With his new sophomore opus, “The Passionate Ones,” it’s clear that Nourished by Time — the nom-du-R&B of Baltimore singer-songwriter Marcus Brown — still has plenty of life stashed away in the pockets of his work pants.

This is an album filled with strangely exhilarating, broad-

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