: It is designed to be compatible with older AC-3 hardware via transcoding or "downmixing". E-AC-3 vs. Other Codecs Feature E-AC-3 (Dolby Digital Plus) AC-3 (Dolby Digital) AAC (Advanced Audio Coding) Max Bitrate Up to 6.144 Mbps Up to 640 kbps High efficiency at low bitrates Max Channels 15.1 5.1 Varies (often stereo/5.1) Common Use Streaming, Blu-ray, TV DVD, Digital TV YouTube, Mobile, PC Common Playback Issues & Solutions A frequent issue for users is the