Unlike its predecessor AC-3, E-AC-3 supports higher bitrates (up to 6.144 Mbps) and more audio channels (up to 7.1 discrete channels). A standard DD+ test file typically contains:
Another community-driven collection is a comprehensive set of surround sound test files available on Google Drive, as shared by Reddit users. This collection includes test files in almost every format imaginable, including Dolby Digital Plus 5.1 (E-AC-3) and 7.1 (E-AC-3). dolby digital plus test file repack