PORTLAND – Tickets to Guster’s Saturday, Aug. 19, concert at the Cumberland County Civic Center go on sale at noon today.

Concert tickets are $30, general admission, all ages. They are available at the civic center box office, at all Ticketmaster outlets, by calling Ticketmaster at (207) 775-3331, via the box office at (207) 775-3458, and on-line at www.ticketmaster.com and www.livenation.com.

Reprise Records is scheduled to release “Ganging Up On The Sun,” Guster’s newest album June 20. “Ganging Up On the Sun” is the Boston-bred quartet’s fifth studio-album and is the follow-up to 2003’s beloved “Keep It Together,” which debuted at No. 35 on The Billboard 200 and has sold 267,000 copies in the United States, according to Nielsen SoundScan.

“I definitely think this is our most ambitious album, and we were a lot more fearless going into this one musically, lyrically and production-wise,” vocalist/guitarist Ryan Miller said in an interview with Billboard.com.

“In some ways, these songs are all over the map in texture and sound and tempo and feel, but I hope, and think, that there emerges a through line that draws them all together. What that line is, I don’t really know. Melody? Pop sensibility?”

“Each of our albums have progressed logically from the one before,” Miller said. “‘Lost and Gone’ was the last chapter of the ‘bongo drum’ era and ‘Keep It Together’ was us getting our sea legs with new instrumentation and a renewed sense of creativity. With the addition of [multi-instrumentalist] Joe [Pisapia] in the last two years, it felt like we were finally hitting some sort of writing stride,” he said.

Guster has built a fanatical fan base through near constant touring and three previous releases before “Keep it Together”: 1994’s “Parachute”, 1996’s “Goldfly”, and 1999’s “Lost And Gone Forever.”

Guster, which now includes Nashville-based multi-instrumentalist Joe Pisapia as a full-time member alongside singer/guitarist Ryan Miller, singer/guitarist Adam Gardner, and percussionist Brian Rosenworcel, produced half of the songs on the forthcoming album.

Opening the 7:30 p.m. concert will be Ray Lamontagne, whose last performance in Maine was a sold-out show at the State Theatre last August. His next album, “Till The Sun Turns Black,” is scheduled to be released in late summer.