ea982cb8__Reference___Tech_Center___NPR__FIELD_DESCRIPTION
[FIELD NAME] audio [SUB-ELEMENTS AND PARAMETERS] id : The unique ID for the audio asset. primary : Defines whether or not the audio asset is the primary audio for the story. audio does contain sub-elements called "duration", "description" and "format". format also contains sub-elements. [FIELD DESCRIPTION] 
All available audio associated with the returned story. This will include all formats to which NPR has the rights to distribute.
API Output Reference : Tech Center : NPR
FIELD DESCRIPTION