When The Orb and David Gilmour came together over a decade ago to produce the two-part, 49-minute ambient soundscape dubbed Metallic Spheres, there almost seemed to be a bit of unfinished business attached to what we were hearing and now we know why. As good as the stereo mix of October 2010’s Metallic Spheres truly is, the whizzing and whirring electronic sounds put forth on the album by The Orb’s chief sonic scientist Alex Paterson, as coupled with David Gilmour’s instantly recognizable searing and soaring sustained guitar riffology clinic, seemed almost too big to b