Google Pinpoint

Google Pinpoint is part of the Journalist Studio suite, designed to help researchers and journalists analyze massive collections of documents, audio, and video. It is exceptionally powerful for transcribing long recordings and searching through them for specific keywords. Because it is backed by Google's infrastructure, it is fast and handles large files with ease. It is completely free for verified journalists and researchers.

If you have hours of interviews to sift through, Pinpoint's ability to index and search across multiple files is unmatched.