The Chicago experimental scene is something of an incestuous melting pot of shared ideas and shared sound. The Chicago Underground Duo of Rob Mazurek and Chad Taylor are two vital members of the seeming tireless core of creative upwelling that sits at the centre of this scene; and through their work as a duo, and in larger ensembles (the Chicago Underground Trio, Quartet, Orchestra – not to mention the Exploding Star Orchestra, plus their work with other bands such as Iron and Wine and Marc Ribot’s band), they’ve been hugely influential in making that scene what it is. Boca Negra (named after the mouth of the volcano Tiede on Tenerife) is their 5th album as a duo and continues their quietly dazzling mix of jazz improv and studio electronics.