Today, rising producer—and recent Bubblin’ Up-featured artist—South London Ordnance offered up a new track for free download as part of FACT‘s ongoing 2012 Advent Calendar. Like most things from the South Londoner, “Dune” is hard to pin down in exact terms. The tune is impressively dense and enveloping, but just when you think you’ve got it all figured out, SLO throws in an acid-tweaked lead and keeps us guessing. You can stream/download “Dune” via the player below.