It was a dark and stormy night. Four demented geniuses worked in their lair, cultivating and composing what was to be their masterpiece, an excursion into what music writers have called “darker territory.” Dr. Frankenixon has created a new monster.

It’s alive! It’s ali —

“That’s total bullshit,” says Frankenixon frontwoman Evelyn Finch. “It’s just a thing critics like to say to differentiate this record from the other one, I think.”

So much for clever analogies.

The new monster album, “Amorphous,” is the band’s fourth collection of music to be immortalized in a polymer disc. Slated for release Tuesday, the new album will be celebrated at a CD release party at about 9 p.m. Monday at The Practice Space, 138 Main St.

“Nine or 10,” says guitarist Joe Kiplinger. “We’re loose like that.”

Loose, too, in the fact that the band members will sit down in a beer garden for an interview minutes before they are to go onstage to perform. They seem also to be unfazed by the raucous hooligans at the adjacent table who are cheering constantly — and with great volume — for no justifiable reason.

They are all happy and talkative, occasionally joining the revelers in their hoot-and-hollery. All but drummer Weston Dailey, who, when the half-hour interview is over, will have made two comments, one of them “yes.”

“Weston embraced the silence with great alacrity,” Kiplinger says. “I just learned that word today. It means eagerness.”

“Aaaaay!” says the crowd, now beginning to sound like a chorus of Henry Winklers.

“Aaaaay!” The members of Frankenixon chime in, not wanting to feel left out.

This type of fun-loving impulsiveness seems to give the band its livelihood. Regardless of whether the new album is dark or not, the band members are ever-smiling and wisecracking. The sense of camaraderie is strong enough that one can imagine the band members all living together in a quaint little house in Des Moines.

Appropriately enough, they do now live together in Des Moines, a move that has saved money, cut down on travel time and improved communication since the band to tour heavily.

“I have such an easier time being able to talk to people in person,” says bassist Ben Baier. “It’s just easier with everyone being in the same house.”

“Aaaaay!”

“Aaaaay!”

For all their spontaneity, the members seem to be in the band for the long haul. The need for things like careers plays second fiddle to the need to play in the band.

“I actually turned down a manager position at [Aldi],” Dailey says.

True devotion to the music, indeed. But what do they think the future will hold?

“We don’t think at all,” Finch says, “We just try to evolve.

“Aaaaay!”