If you go

What: The Longest Day of the Year, opening for Lukas Nelson & Promise of the Real

When: Doors at 8:30 p.m. Sunday, show at 9

Where: Fox Theatre, 1135 13th St.

Cost: $12.50 advance, $15 day-of

More info: foxtheatre.com

It's been two years since The Longest Day of the Year released a record (there's a joke to be made here, but it's not worth it). But the Boulder rockers have some new music ready, along with a new band member, Melissa McGinley. This Sunday, they'll debut the new material at the Fox Theatre. We caught up with bassist Dan O'Donnell ahead of the show.

Tell me about the new songs.

We're playing about six brand-new songs that have never been heard outside of our ears at the show this weekend. We started with about 30, right around Christmastime, and our goal was to be in the studio this past week. Our producer had a concussion, so we had to bump it. We narrowed it down in order to get ready for the studio. So, yeah, we're down to 15 and we're pretty excited to get back in there. I think the last album was two years ago January, which means it'll be about three years now that we started working on the last album. It's been a little bit, but we're working with Coupe Studios again, here in Boulder.

And what about the new band member?

She plays electric fiddle. You might have caught [her old band] at the pub, they're a touring band called The StereoFidelics. She moved out here in the fall and she did some work on the last album, and we've been friends for a while, and she's a natural fit. It's nice to have two soloists. Brian's on electric guitar and they can play back and forth, then it adds some depth.

You mentioned the new songs have a new sound. Can you describe it?

Still, obviously, we have our roots in the alt-country kind of Americana we always had, but the sound itself is a little more rock 'n' roll — a little heavier, a little darker, in my opinion. Sean wrote the lyrics on the first album, and same with this one. We strive to collaborate more as far as instrumentals, and we did it a lot more with his album compared with the last album. A lot of the content, lyrically, is still talking from the same point of view. The roots are where they were before.

That seems like a trend around here lately.

I think what's new in the last few years that the kind of mainstream acts open the door to that cross over. The Avett Brothers or Mumford and Sons — it would have been a niche folk following 10 to 15 years ago. Now that it's more mainstream, it brought more people into the fold. Before, you might only listen to country stations, but now there is a lot of crossover, and it brought in new listeners, and as soon as you see that that works, it allows people to branch out and play some stuff that has more rock to it.

So when is the album due out?

We're looking at an early fall release. We're doing all the dirty work this coming weekend, and then we'll have time to sit back and fix things and improve.

Contact Ashley Dean at 303-473-1109. On Twitter: @AshaleyJill