When Angel Olsen first found community in the Chicago indie music scene, she was an unabashed fan-girl. Now she’s an accomplished artist who commands the stage with a voice that is pliant and pitch perfect. “Something changed when I got introduced to indie music. Then later someone was like, ‘You need to listen to Leonard Cohen, you need to listen to Fairport Convention, King Crimson, The Velvet Underground…’ And I was like, ‘Okay, this is it.’ ”