In June, Potter and her mates reintroduce themselves as a recording act. The album is titled simply “Grace Potter & the Nocturnals,” an indication that there is a rebirth going on.

“I think we've found it,” Potter, who performs a free show with the Nocturnals on Sunday, March 21 in the Aspen Skiing Company's Hi-Fi Concert Series at Snowmass Base Village. “It's soulful — but it's not soul. It's not r&b. It's got the attributes of my favorite singers — Etta James, Ella Fitzgerald. But with the edge of Robert Plant.”

“Tiny Light,” the first single from the album, actually does have its subtler facets, including an intro that is straight out of Southern blues. But toward the end, there is a thrashing, building guitar solo from Scott Tournet, coupled with some primal, unrestrained screams from Potter, the likes of which may not have been heard since Janis Joplin. Potter says that is just a hint of what the band brings to the live stage: “If you spend time at any of our concerts, you see it's an unapologetic approach to rock ‘n' roll.”

Potter finds there has been a relative shortage of such expressions. “It makes me sad to see so little of that,” she said. “I love watching VH1, people just expressing themselves, doing something wild. I want to get back to that. It doesn't have to be wildly original. I hate seeing people do things just for the sake of originality. There's nothing wrong with two guitars, a Hammond B-3, bass and drums. I don't mind that electronic factory onstage — but that's not required.”