Guitarist Mary Halvorson plays in several excellent bands. Stephan Crump's bass helps power the Vijay Iyer Trio, one of the most acclaimed modern jazz groups. Together, they team up for something surprisingly calm, at least in its opening tracks. The atmospheric "Moom Song" sounds like an abstracted Ry Cooder piece. But the vibe doesn't stay there: Scratchy, short improvisations follow. And "Winds Me to Pieces" hints at the spiky interplay that emerges on the final three (and longest) tracks. Skip to there if you want the highlights, though there's nothing wrong with the scenic route either.