On “Unknown Number,” instrumental trio Obstacle brings to bear technical chops both in performance and in post-and-live processing of sound to create this brilliantly strange and always evolving track that one wants to call ambient, post-rock, IDM and No Wave funk. And it’s all of that with the finely processed and reassembled bits of sonic texture and architecture. Each fragment of sound is vivid and intersecting with what sounds like a natural rhythm with every other and placed expertly in the mix. In that way it is somewhat reminiscent of Sirens-period Nicolas Jaar minus vocals—where even the most outré sound is intentional and helps to draw you into the songs specific experiential world. What Obstacle is doing here straddles the world of musique concrète, noise and experimental electronica with an exquisite compositional balance. Listen for yourself and follow Obstacles further adventures into the artful assembling of sound at the links below.