Here’s a trivia question that, until about a week ago, most people would have gotten wrong: Which of these country artists is not a member of the Grand Ole Opry: Carrie Underwood, Josh Turner or the Oak Ridge Boys? No slight to the youngsters Underwood and Turner, but would anyone other than the most studied of Opry followers have thought that the venerable Oak Ridge Boys were not members of that august institution? Yet the group that made its first Grand Ole Opry appearance back in 1954 wasn’t inducted as a member until Aug. 6.

Here’s a trivia question that, until about a week ago, most people would have gotten wrong:

Which of these country artists is not a member of the Grand Ole Opry: Carrie Underwood, Josh Turner or the Oak Ridge Boys?

No slight to the youngsters Underwood and Turner, but would anyone other than the most studied of Opry followers have thought that the venerable Oak Ridge Boys were not members of that august institution? Yet the group that made its first Grand Ole Opry appearance back in 1954 wasn’t inducted as a member until Aug. 6.

“We were totally shocked. We had been friends of the Opry for years and always wanted to be members. For this to finally happen, it was like a dream come true. And still is,” Richard Sterban said during a phone interview.

Except for a period from 1987 to 1995, the Oak Ridge Boys’ lineup — Sterban, Duane Allen, Joe Bonsall and William Lee Golden — has been together since 1973. They are the voices behind the group’s biggest hits, including “Ya’ll Come Back Saloon,” “American Made” and “Elvira,” which came out in 1981.

“We’ve been going around the country celebrating 30 years of ‘Elvira,’ which is hard to believe,” said Sterban, whose rich bass provides the song’s familiar “oom papa mow mow.”

Unlike some musical groups who have been kicking around for decades, however, the Oak Ridge Boys are not totally tied to nostalgia. In 2009, they released “The Boys are Back,” an album that featured a cover of the White Stripes’ hit, “Seven Nation Army.” They put their distinct sound on the cut by recording many of the instrumental parts as vocal tracks, with Sterban carrying the song’s bass line hook.

“That particular song has gotten us more attention over the last couple of years than anything we’ve had in a long time,” Sterban said. “One of the things that has kept us going for so long is that we really embrace that creative process. That’s one of the things that puts new energy into our group.”

The group has been back in the studio preparing its next album, which will be released in September and distributed through Cracker Barrel stores.

Sterban said that the arrangement with the popular restaurant chain is a natural because its customers are demographically similar to the Oak Ridge Boys’ fans. Cracker Barrel also has a strong record of being able to sell records, even during a time when most brick-and-mortar music retailers are struggling.

They attempt to strike that same balance in their live performances.

“The Oak Ridge Boys are family entertainment. There’s something for everyone in the family,” Sterban said.