Big Grams is a collaboration between Greenwich, New York indie electronic duo Phantogram (Sarah Barthel and Josh Carter) and rapper Big Boi (Antwan Patton) of Atlanta-based hip-hop duo OutKast, in which the artists allow themselves to venture out of their respective comfort zones and experiment with ideas they wouldn't have explored with their own projects. The two acts connected after Big Boi discovered Phantogram's music via an Internet pop-up ad; he posted about their music online, and the duo, who counted OutKast as one of their biggest influences, responded enthusiastical...