ArcTanGent has been described as “Christmas Day for guitar geeks,” and making it out during the month of August has become a pilgrimage for math rock, post rock, and progressive aficionados. While every other outdoor music in the festival in the world is awful, ArcTanGent is great. Why is it better than all the rest? Co-creator Goc O’Callaghan joins us to explain the how and the why behind the past and present of ArcTanGent festival. Featuring music by Macaulay Vulcan, HOME, Fight Cloud, Yikes!, and Rob Ford Explorer.