Tim Hecker and Daniel Lopatin's new album, Instrumental Tourist, comes out Nov. 20. Spencer C. Yeh/Courtesy of the artist hide caption

itoggle caption Spencer C. Yeh/Courtesy of the artist

Moogfest always draws a creative crowd. But the festival's proximity to Halloween inspires some fans to dress in unusual costumes. Adam Kissick for NPR hide caption

itoggle caption Adam Kissick for NPR

Clockwise from upper left, all taken at Moogfest: costumed fans at the Animoog Playground, Atlas Sound, fans reacting to one of the live sets, The Field, a dewy-eyed fan. Adam Kissick for NPR hide caption

itoggle caption Adam Kissick for NPR