Soundtracks for EBooks?

Yes, that is correct. Just as sound and music enhances the emotional impact of movies and television shows, New York City-based startup Booktrack is trying to do the same for ebooks. With an iOS app already in the market and an Adroid app on the way, Booktrack allows ebook readers to listen to ambient background noise relevant to the book's current setting, specific sound effects synchronized to the text as it is read. 

Will this new twist on audiobooks entice people to read more in digital formats?   Probably unlikely.  However, it is another step in the slow transition or evolution of digital reading materials, and the technology is likely to find a usage.  More power to it if it does. On a side note Peter Thiel, co-founder of Paypal, is the lead investor of Booktrack.