Sometimes issues happen with projects and you need to find the raw audio recorded files where GarageBand has stored your interview (different to your exported files).

  1. Navigate to your GarageBand project in Finder and control click on GarageBand and select Show Package Contents. Navigate to /Media/Audio Files/ and you should find all raw recorded files. However, be mindful that if you have deleted the audio in GarageBand (most versions of GarageBand) and saved the project, the audio files will be deleted from disk entirely.