“Perpetuum Mobile” is the result of a uniquely schizophrenic “open source” compositional process: the UK's finest collage composers (collage-posers?) Ergo Phizmiz and People Like Us (aka Vicki Bennett) uploaded files to a shared server, downloaded and processed each other's work, and flung the resulting fragments back at each other. The result is an interpenetrating audio-collage so intricate that neither party can recall who did what to whom. So far, so avant-garde; but what makes this record different is that Ergo and Vicki then wrote and sang their own vocals on top of their Frankenstein creation. Here you will find slyly absurdist lyrics replete with monkeys, carousels, trousers, apple trees, tinkling bells, dogs, sausages, whiskey, and cannibalism. No matter how fraught with trauma, these ballads and ditties are sung with a straight face and mixed front and center, and the results feel like 1930s British music hall standards from an alternate universe: half Ivor Cutler, half George Formby. The astonishing thing is that for all this jiggery-pokery, “Perpetuum Mobile” makes for an exhilarating, remarkably fresh pop album. It works. On “Ghosts Before Breakfast” Ergo and Vicki proudly declare that they've got “quite a selection of pastry”, and if the profusion of cuckoo clocks, gunshots, horn farts, string vamps, and digital malfeasance which go hurtling through this opening track is any indication, that's no idle boast. For sheer cornucopia of sonic raw materials, this track's avalanche of information sets the tone for the overflowing, manic record that follows. There's far too much to fully parse, but among the highlights: “Beyond Perpetuum” pushes off from the Comedian Harmonists' take on the 19th century compositional craze for “moto perpetuo” runs of continuous notes at a rapid tempo, and folds found piano, voice and strings into an interlocking array of M.C. Escher harmonic stairways. “Air Hostess” is detourned lounge pop that stitches together Nelson Riddle's “Ya Ya” theme to “Lolita”, “Walk Right In”, light operettas, organ, bachelor pad cha cha and mambo, and nervously twitching shards of Louis Armstrong. “Pierrot's Persecution Mania” bravely explores the possibilities of a Montparnasse-via-Dixieland hybrid of can-can and bluegrass, with ridiculous canned strings colliding with jew's harp boings, while “Soggy Style” rides banjo twangs, a digital bossa nova breakdown, and the “whooo-ooes” nicked from Terry Stafford's “Suspicion”. Living up to the perpetual motion of its title and cock-a-hoop cover art, this is a frantically energetic music whose layered repetitions become cumulatively more disorienting and preposterous as they loop back. “Perpetuum Mobile” goes beyond the stealth-oldies nostalgia of the mashup scene and the “culture-jamming” rhetoric of plunderphonics, and shows Mr. Ergo and Ms. Vicki to be a potent, if Surrealist, songwriting team, and together they braid oddly affecting vocals and their trademark stolen audio into twenty-first century pop. Like the perpetual motion machines for which it is named, this collaboration will run and run and run and run and run and run and run. . .