After teasing a collaborative album back-and-fourth on their respective Instagrams, Big Boi and Phantogram officially made their live debut as Big Grams this weekend in LA. On Saturday (August 29), Big Boi performed new material with Phantogram at the Epic Fest, and promised the crowd at the LP is “coming soon.” And from the sounds of the mash-up, Big Gram seems to fit right where you expected them to land between hip-hop and chill-rock. Other artists on the label such as Future and Ozzy Osbourne also performed.

Check out a few highlights below, and look out for Big Gram’s debut project soon.