The husband-wife team of Derek Trucks (guitar) and Susan Tedeschi (vocals, guitar), fortified by their 11-piece band, isn’t afraid to take on a honkin’ hard blues such as “Rollin’ and Tumblin’.” But they sound just as good when they’re beefing up folkish material like Fred Neil’s “Everybody’s Talkin’” and the Lovin’ Spoonful’s “Darling Be Home Soon,” which they stretch out past 10 exploratory but tender minutes. Tedeschi, who’s never had problems handling sassy material, shows more warmth and subtlety with each new effort as a singer, but can still get down and dirty as well; that’s her raunch guitar on “Learn How to Love.” Trucks has boiled his slide guitar down to its essence while refining his tone even further; he intros “Midnight in Harlem” with a tantalizing mash-up of “Swamp Raga” and “Little Martha.” It’s usually embarrassingly premature to cut a second album live (and make it a double disk at that), but this one, whether reprising tunes from their debut or uncorking remakes like Stevie Wonder’s “Uptight,” does the job impressively.