PORTLAND — For the past 34 years, BeauSoleil of Lafayette, La., has elevated Cajun music to one of domestic and international acclaim.

On Aug. 20, the Grammy Award-winning band will play at Port City Music Hall.

Tickets go on sale at 10 a.m. Thursday, July 1, and will be available at Bull Moose Music Stores and online at www.portcitymusichall.com. Advanced, general admission tickets are $18, $20 day of show. This is a 21+ event.

BeauSoleil’s latest release and Yep Roc label debut, “Alligator Purse,” is not only a vibrant testament to the band’s healthy spirit, but is its most adventuresome record yet.

Formed in 1975, BeauSoleil has garnered 11 Grammy nominations — including a 2010 nominee for “Alligator Purse” for best zydeco or Cajun music album — and has appeared regularly on Garrison Keillor’s “A Prairie Home Companion.”

While introducing their sources of inspiration (Dennis McGee, Canray Fontenot, Varise Connor, Wade Fruge, Dewey Balfa, Amedee Ardoin and Freeman Fontenot) to new audiences, the band also blends zydeco, Tex-Mex, western swing, blues, New Orleans traditional jazz and Caribbean calypso.

Whereas most Cajun bands revolve around their accordionist, BeauSoleil’s emphasis has always been on fiddle, showcasing it heavily in its arrangements. The wooden stringed instrument played with a horsehair bow was the lead instrument of choice before the advent of the diatonic accordion in the late 19th century when the repertoire consisted largely of fiddle tunes.

BeauSoleil became a Cajun band of many firsts. It was the first to play the frottoir, the rub board that’s a staple in Cajun music’s cousin genre zydeco. BeauSoleil was also the first Cajun band to feature an acoustic guitarist, Doucet’s brother David, who flatpicked his lead parts in place of the proverbial steel guitar. In 1998, it became the first Cajun band to win a Grammy for “L’Amour Ou La Folie” in the traditional folk category.