Two days after playing a duo concert with his guitarist father, Pedro Soler—his partner on 2011's Barlande, a stunning free-form flamenco effort produced by the National's Bryce Dessner—experimental cellist Gaspar Claus opens up the field, collaborating with a diverse cast of local luminaries, including Ben Greenberg (Hubble, Zs), Bing and Ruth's David Moore, Andy LaPlant and Jessica Larrabee of She Keeps Bees, Dessner himself and more.