In the tradition of ambient prog-rock bands Mogwai and Explosions in the Sky, local instrumental outfit Air is Human work layered guitar, keyboard, bass and drum parts into deftly spun expanses of sound waves with a cohesion and fullness that belies their status as a duo.  Following the release of The Infinity Limit in August, Air is Human hit the ground running with shows at North Star Bar, World Cafe Live and PhilaMOCA’s Tuesday Tune-Out.  More information for their April 13th show at El Bar with Tuesday Tune-Out compatriots Edison can be found on the Facebook event page here.  Stream “Orbital R.S.V.P.” below.