Abstract: An application for electronic devices through which users can synchronize custom sound recordings and sound scores with eBooks. The application allows a computer to receive audio reference lists; values representing how similar users are to each other based on various factors; and a structural representation of an eBook. The application then tracks a first user's position in the eBook, synchronizing the relative position with the structural representation of the eBook, and determining if the first user's position has progressed to a specific point. If the first user has reached the specific point, the application suggests audio that was previously synchronized by other users with the point, and the application orders the suggestions based on the similarity between the first user and a previous user that created a suggested sound score. The first user can then associate a presented audio with the point.