The Receiving End of Sirens, the headliners of a 9:30 p.m. Saturday show in HUB Alumni Hall, is a difficult band to describe. Genre labels usually fall short, anyway, but in the case of this band, in particular, oft-used phrases "post-hardcore" and "experimental rock" seem to fall even shorter.

"They have a complicated sound," Jared Newman (senior-public relations) said.

Newman, who booked the show, said though he couldn't really describe the Boston band's sound, he was definitely a fan, and this was the main reason he booked the band.

"They put on a phenomenal live show," Newman said. "They're going to work really well at Penn State, and [when I book shows], I'm always looking to please as many kids as possible. However many kids show up will walk away feeling good."

Because the show is free, admission will be based on a first-come, first-serve basis -- once Alumni Hall is full, no one else will be allowed in.

Zoe Yeaton (sophomore-psychology) said she began listening to the Receiving End of Sirens last fall, when she borrowed some CDs from her boyfriend.

"I took to them because they had a different sound," she said. "It's a little bit of an epic sound. They experiment more."

Yeaton said the band's newest album, The Earth Sings Mi Fa Mi, showcases the band's unique elements.

According to the press release the band issued with the album, the title and concept come from 16th century astronomer Johannes Kepler's theory that as the planets orbit the sun, they each emit a musical tone that varies depending on where they are in their orbit.

"It's more interesting to listen to than a regular pop-punk or hardcore band," Yeaton said.

Newman said that while the Receiving End of Sirens would be headlining the show and be the biggest draw, the openers -- Automatic Loveletter, of Tampa, Fla., and Wild Sweet Orange, of Birmingham, Ala. -- are worth seeing as well.

"They aren't huge, but they're very strong up-and-coming acts," Newman said. "In a year or two, they'll be just as big. They have very bright futures."

Chris Ruggiero (senior-earth sciences) said that though he listens to the Receiving End of Sirens "a little bit," he is more excited for the openers.

Ruggiero said he saw Automatic Loveletter in Altoona last summer and came away "really impressed" with their set.

"I saw them play an acoustic set," Ruggiero said. "It was pretty mellow, and [singer Juliet Simms] gets pretty into her music. I appreciate when people do that."

He also said he hadn't heard of Wild Sweet Orange originally, so out of curiosity, he checked out some of the songs the band posted online and liked what he heard.

"I'm looking forward to them, too," he said.