Custom Dolby Audio: Kindle Fire HDX uses the power of Dolby Digital Plus to create a world class audio experience. Dolby Digital Plus includes technology that adjusts volume, creates virtual surround sound, and delivers easier-to-understand dialogue in movies and TV shows. Kindle Fire HDX is designed to automatically optimize the audio profile based on what you’re doing (with or without headphones), such as watching a movie, listening to music, or talking on Skype.
