Since Mark Holub relocated to Vienna in 2012, he's been able to put some distance between himself and the peppy jazz-rock he helped create as drummer with Led Bib, and get back to free improvisation. Violinist Irene Kepl was one of the first local musicians he hooked up with after his move and this duo debut revels in finding ways of reconciling two instruments that don't often play together. On pieces like the title track, Holub's unable to resist flirting with a loose and subtle groove but, for the most part, he takes a much more abstract approach, ranging from hyperactive fidgeting on rims and cymbals to low, rumbling tom-thunder with a spare, ceremonial feel. Kepl responds with gestures that seem more intent on establishing mood than making clear melodic statements: from knife-edge, minimal harmonics with the bow barely touching the strings, through lurching scratches and tics and rising up to rough stridulations. It's convincing and compelling, with a genuine sense of dialogue throughout.