Fans of folk adventurer Bonnie Prince Billy will be used to the Kentuckian's promiscuous collaborating, but this is one of his most eccentric assignations. Featuring the posh-damsel-gone-bad vocals of Lavinia Blackwall and Alex Neilson's psych-jazz take on medieval music, Scotland's Trembling Bells provide a genre-bending backdrop for Will Oldham's mischief. Sometimes it's hair-raisingly great, as on their fierce take on "Riding", a great old tune of Oldham's, or the surging coda of "Ain't Nothing Wrong With A Little Longing". Elsewhere, this incandescent music can stray into baroque perversity, and the marriage of Oldham's quaver and Blackwall's stentorian warble can feel a little forced.