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DTS and Dolby Digital have been locked in a format war since the 1990s, and the entertainment industry solved it by supporting both. DTS is the surround sound codec that launched with Jurassic Park in 1993 and went on to become a standard audio format for Blu-ray discs, cinema releases, and home theatre systems.
The base DTS codec encodes 5.1 surround at up to 1.5 Mbps — significantly higher bitrate than Dolby Digital's 640 kbps maximum, which DTS fans argue produces audibly better quality. The extended versions (DTS-HD Master Audio, DTS:X) offer lossless compression and object-based surround sound, competing directly with Dolby TrueHD and Dolby Atmos.
You'll encounter standalone .dts files when extracting audio from Blu-ray rips or working with multichannel audio production. VLC decodes DTS without issue. For conversion to more portable formats, FFmpeg downmixes DTS to stereo AAC or MP3 efficiently.