Almost 10 years after Indubious released its debut "Fresh Leaves," bandmates and brothers Evton and Skip Burton's manifest of progressive rhythms and positive messages continues with their newest, "From Zero," released July 1.

"There's no mistaking Indubious' reggae beats, rhythms and positive sentiments about humanity are there," Evton Burton says during a telephone interview from his home in Bend. "That is not to say that the band hasn't found new ground. It's music goes beyond the message."

The Burtons, who play guitar, keys and penned the songs for "From Zero," are joined by drummer Corey Foster and guitarist Teddy Presberg on the album, self-recorded and produced in Burton's own studio and released on independent label Righteous Sound.

"The idea behind 'From Zero' is that we are born with nothing, born to this universe entitled to nothing," Burton says. "When we come from that perspective, then everything we receive, everything we have, is a blessing. When we can embody that vibration and instill it in the music we play, we don't feel entitled to anything through our music. It's an offering from our hearts.

"We didn't really try to move forward with our music or adhere to any style on this album," he adds. "The music is to create what comes naturally from within us. With that, I think our style has become a little bit more fluid. When you are just being yourself, you become something more original."

Indubious' distinctive sound is clean and strong, open and simplistic, and weaves itself around a backbone of reggae.

"That is the direction of the music," Burton says. "We stopped trying to intellectualize it. Music doesn't come from the mind, it comes from the heart. We've gotten past the urgency of reciting lyrics a million miles a second, and now the songs are more centered. We have less to prove, and we've started to understand the power of subtlety.

"One of the songs, 'Root Down,' has an R&B feel," he says, "and other songs are more poppy. It just is what it is. It's own little thing."

That "little thing" came in at No. 6 on the Billboard reggae album chart two weeks ago, beating Ziggy Marley by a slot, and debuted at No. 8 on iTunes' reggae chart.

Reggae artists Vaughn Benjamin (Midnite) and Sizzla Kalonji make cameo appearances on "From Zero."

"We joked about getting Sizzla on one of the album's songs," Burton says. "A few weeks later, a promoter contacted us to play a show with Sizzla in Portland. He invited us onto his tour bus and wrote and recorded a verse for 'Golden Ones.' He's a reggae legend from Jamaica, someone Skip and I grew up listening to.

"Vaughn is another of our favorites, from St. Croix. He's a prolific recording artist with about 70 albums. We'd met him before, and when we heard he was performing at the Volcanic Theatre Pub in Bend, we called his manager. He came to my studio, and we recorded 'Don't Lose Sleep.'"

While Evton and Skip Burton favor the creative freedom of independent recording, they remain open to working with various producers at commercial studios.

"There's certainly charm in stepping into a studio, doing your thing and having someone else do it all, and for the sake of creating more art for the planet, I wouldn't be opposed to doing that," Evton says, "but different producers can create different experiences each time. There's nothing wrong with that."

Along with "From Zero" and "Fresh Leaves" in 2008, other album credits include "Cosmic Seed" in 2010 and "Wake the Lion" in 2013. "From Zero" is Indubious' first to chart on Billboard.

Originally from the eastern region of the San Francisco Bay Area, the Burtons honed their message for two years before touring through Oregon and Washington. A performance at Riverside Park in Grants Pass became a turning point for them.

The Oregon people, the Oregon vibe, allowed them to blossom, Skip Burton said in a 2008 interview with the Mail Tribune. The boys based themselves in Southern Oregon for awhile before making Bend their home. On Aug. 9, Indubious will perform a free, all-ages show at Bend's Riverside Park. 

The brothers were born with cystic fibrosis, a hereditary disorder that can affect the lungs and other organs. When they were diagnosed, they made the decision to maintain positive attitudes.

"A positive mind creates a conducive environment in the body for well-being. I know that," Evton says. "Our music's direction comes from deeper within. It's a way of healing ourselves, therefore healing the planet. Change yourself and you change the world. Our health has never been better."