The music CocoRosie make is certainly unconventional: intimate, dreamlike and crackling. The haunting sounds of harps and acoustic guitars broken up by glitchy beats, the noise of Speak’n’Spell and one of those tin cans that moos like a cow when you up-end it. Bianca’s voice, reminiscent of Billie Holiday in its cracked blues vernacular, weaves in and out of Sierra's softer, more operatic tones. But if you’re not scared by its oddity, it’s the sort of music you'll fall in love with.