What role does this person play in your piece? What is the story you are trying to tell and what is this person contributing? Are they talking about a specific topic or event? Do you need them to talk about an event in chronological order? Do you want them to share their reaction to a particular event?
Before recording a conversation or interview with your subject, always make sure to get their consent. It's good practice to have your subject consent to being recorded on tape. If you plan to exhibit or broadcast publicly it is also good practice to get a written consent stating the various methods of distribution for the project.
*For more information about consent see the Collaboration section of the Libguide.