What: 311 and Slightly Stoopid, in concert.

When: 7 p.m. Sept. 4.

Where: Sleep Country Amphitheater, 17200 N.E. Delfel Road, Ridgefield.

Cost: $48.45 through Ticketmaster, 800-745-3000 or Ticketmaster.

Information: Sleep Country Amphitheater.

After more than 20 years of touring and recording, 311 has its share of songs that have been played live hundreds of times. And considering that touring is hardly the fresh experience it was in the early years, it would be understandable if playing live has lost some of its luster for the group.

But singer/guitarist Nick Hexum said that hasn’t happened to 311 for one simple reason — its fans.

“I was reading Keith Richards’ autobiography and he really sums it up, that the energy from the audience comes back and makes it exciting and a new experience no matter what,” Hexum said in a recent teleconference interview with reporters. “Sometimes, when you’re out in a long tour and you haven’t had enough days off, the sound check might be very grueling, like, ‘How am I going to be able to do this tonight? I’m tired.’ Sometimes you get sick, whatever. But when you get on stage with the audience there, it’s a completely different experience. And you just feed off that energy.”

One thing that has also freshened up the touring experience was last year’s release of the CD “Universal Pulse,” which has given the band some new songs to incorporate into its set.

It’s a very up-tempo, hard-hitting CD. The reggae, world beat grooves and rap elements that have been part of 311’s sound since the band debuted with the 1993 CD “Music” still appear. But “Universal Pulse,” 311’s 10th studio release, is first and foremost a rock album — and a catchy one, at that.