MIAMI, Okla. — The vocal band Six — a Branson act composed of six brothers — will be performing two shows inside the historic Coleman Theatre tonight and Saturday.

Six, dubbed an “orchestra of human voices,” features the six oldest of 10 siblings who have been singing together since the late 1970s. They are the longest-running original cast a capella group in the world, playing a hefty mix of contemporary pop, rhythm ‘n’ blues, classic rock, doo-wop, gospel and patriotic. They made their television debut in 1978 on “The Osmond Brothers Special.”

“This is going to be an amazing show,” Shannon Duhon, managing director of the Coleman, said of Six. “These are six brothers who are gifted vocalists and know how to entertain an audience. We have had some amazing shows at the Coleman, but this show has the possibility to top them all. Expect to be wowed; expect to be entertained.”

And why is that? It’s rather simple, said second-oldest sibling Kevin Knudsen.

He and his five brothers — Lynn, Curtis, Barry, Owen and Jak — sing every note live.

“In this day and age, we might just be one of the few truly live, 100 percent shows left,” Knudson told Branson Tourism Center. Not just the lyrics but the instrument sounds, as well. And that’s a key to Six’s success — even though audience members will swear they are listening to actual instruments, “every sound they will hear comes from our mouths,” he said.

There is an important and even lucrative connection between Branson and Miami, Duhon said, and it seems to be growing each year. While Branson acts have taken their shows on the road to Miami in the past, it was the 2017 concert involving Shoji Tabuchi that really opened everyone’s eyes: The popular entertainer sold out the Coleman.

“We love to offer live programming,” Duhon said. “That’s our main mission. That programming comes in the form of concerts, plays, dance recitals, school programs and even our silent movies can be considered live entertainment if you have ever seen Dennis James play The Mighty Wurlitzer pipe organ. Watching him play is every bit as entertaining as watching those classic silent films.”

“It is that base that makes us such an attractive venue to artists,” she continued. “Certainly the success of shows like Shoji Tabuchi and SIX of Branson only adds to that appeal.”

Show times for both nights are 7:30 p.m. Tickets are $37 for adults, $32 for seniors and veterans and $22 for students and children.

Details: Call the box office at 918-540-2425 or visit www.colemantheatre.org or www.thesixshow.com.

‘Exception to the rule’

“A promoter recently paid us the best compliment I think anyone could possibly pay us,” said Coleman Theatre managing director Shannon Duhon. “He said of all the theaters he deals with, we are the exception to the rule. No one, he said, does as much as we do to ensure the success of a show. That’s a great compliment — and it is all because of our staff and volunteers.”