The New Yorker has audio files available online in mp3 format.
HERE is the New Yorker page where I found the link to Louise Erdrich's 30-minute reading of her story "The Plague of Doves," recorded at the 2006 New Yorker Festival.
Download the mp3 HERE.
Read text online: From 2004, Erdrich’s story “The Plague of Doves.”
Making this material available to the world is incredibly important. Gives me that warm and fuzzy feeling.