Their more popular recent singles, "Mr. P-Mosh" and "Millionaire," have a bouncy avant-hip-hop sound, and I always kind of thought of them as the Mexican Beastie Boys. But I should have been thinking of them as the Mexican Beck: the LA singer helped sign P-Mosh back in 1998, and it's his genre-hopping career that the duo's most resembles.

All U Need is Mosh kicks off new wave-style with "Toll Free," an angular take on Franz Ferdinand-esque dance-rock. Oddly enough, the slightly awkward English lyrics actually work, giving the track a kind of winking distance. Things get even less serious from there: on Track 3, a crowd chants "Everybody wants to go to my party," an LCD Soundsystem-like chant over a groovy retro-Fatboy Slim beat. They name-drop Paris Hilton, evoking Brazilians CSS, whose invocation of the hotel heiress was so deadpan Ms. Hilton herself danced to it. Another costume change for Track 4, "Let U Know," where they become the Hives, banging out garage-rock chords. Where is this album going?

In a sense, the eclecticism serves to break down your defenses, and by track 8, "Going to Mars Bolton," the listener isn't sure what to expect. Here's what you get: a track that starts out strutting like a rock Daft Punk, with computerized, Frampton-like vocals, then mutates into a series of hypnotic synth arpeggios, evoking Boards of Canada, unexpectedly melancholy. Track 10 is a bass-guitar-led instrumental overlaid with what sounds like a drum cadence; that explains its title, "San Diego Chargers." These songs are listener-friendly but deeply strange, hinting at Rosso's classical and avant-garde history.

In refusing to take themselves seriously, Plastilina Mosh run the risk of the listener not taking them seriously either. But their "lightness" is like Milan Kundera's: a sense of freedom that's not without depth. "Mars Bolton" includes a quick sample, a woman's voice saying "What you intend to do with sound is of the utmost importance." How's that for not being serious. Somehow, P-Mosh can maintain both points of view: an ability to take musical leaps like nothing matters, while understanding that really, there's nothing else that does matter.

All U Need is Mosh is out August 5 on Nacional.

Grab an mp3 of "Arriba Dicembre" and stream "My Party" at RCRD LBL here, and an mp3 of "Pervert Pop Song" from MTV Tres here. Single "Let U Know" is out now on iTunes.