Former Turtle Island Quartet violinist Irene Sazer, a pioneer of string-band improvisation, founded the all-female Real Vocal String Quartet. You could characterize them as a less caustic. considerably more eclectic alternative to Rasputina. They’re playing Barbes on Oct 13 at midnight – and then they’re at Passim in Cambridge, MA the next day at 4:30 PM! That same sense of adventure pervades their music, drawing on genres from around the world to create an enchanting, original, sometimes gypsy-tinged blend.

The best song on their 2010 self-titled debut was a radical reworking of a Paul Simon song, of all things. This time around, they open their new album Four Little Sisters by radically reworking Regina Spektor’s Machines, first giving it a slyly satirical, robotic bounce and then roaring through an outro that’s the furthest thing from detached and coldly mechanical. Everybody in the band – Sazer, violinist Alisa Rose (also of Quartet San Francisco), violist Dina Maccabee and cellist Jessica Ivry - contributes vocals as well, therefore the band name.

Sazer’s instrumental Homage to Oumou follows, a swinging minor-key gypsy/klezmer romp capped by a blazing violin solo, held down by Ivry’s alternately stark, bowed washes and swinging pizzicato basslines. Elephant Dreams, by Rose, has a fresh, distantly West African tinge, swinging counterpoint and an edgy series of bluesy exchanges.

They begin Gilberto Gil’s Copo Vazio with an insistent staccato pulse, growing to pensive, lush chamber pop with a tersely thoughtful Sazer solo. Likewise, Maccabee’s arrangement of the cajun dance Allons a Lafayette gives it plenty of oomph – and some neat four-part vocal harmonies.

Duke Perarson’s Sweet Honey Bee is transformed by a Sazer arrangement into a tioptoeing but acerbic blues ballad with a long, intricately intertwining jam at the end – it makes a good segue with Vasen guitarist Roger Tallroth’s Falling Polska, a moody mix of the baroque and the Balkans. Durang’s Hornpipe, dating from the American Revolution, gets a rousing cajun treatment, and then a long jam, a vein they return to with the album’s more nocturnal concluding track, Grand Mamou Waltz. There’s also a bright, blue-sky cover of the Dirty Projectors’ Knotty Pine. It’s hard to think of another recent album that so entertainingly connects jazz, indie classical, jamband rock and so many other worlds as this one does.