Dwight Yoakam Credit: Emily Joyce

Under the moniker “the LSD Tour” (with the cheeky tagline, “It’s worth the trip”), raspy-voiced Americana singer Lucinda Williams, hard-core troubadour Steve Earle (with his band the Dukes), and spiritual son of Bakersfield Dwight Yoakam have been trekking across the landscape of North America this summer. The package tour—which hits Chicago near the end of its run—promotes Williams’s rerecording of her seminal country-, blues-, and folk-rock-influenced 1992 album Sweet Old World (retitled This Sweet Old World) and the 30th anniversary of Earle’s classic Copperhead Road, as well as Yoakam’s new SiriusXM satellite radio station, Dwight Yoakam and the Bakersfield Beat, which features tracks from his back catalog and the music that shaped him. With more than three decades of road wear apiece and a total of 49 Grammy nominations among them, these three are all major forces in the music world, outliers who ignore changing trends and steadfastly chart their own idiosyncratic courses as artists. Tonight, the modern singer-songwriter legends will offer up selections of catalog classics and new works, and occasionally band together for a number or two yanked from the annals of an alternate sort of Great American Songbook, encompassing the sounds of rural Americana, country, and country rock. King Leg, the LA-via-Nebraska Yoakam protege with mellifluous pipes—touted by Rolling Stone last year as one of “10 New Country Artists You Need to Know”—opens in support of his Sire Records debut, Meet King Leg.   v