Jurassic Park was the very first film to utilize DTS (Digital Theater Systems) digital surround sound. Spielberg delayed the release of the movie until selected theaters installed the necessary hardware to support this new audio format. Sound designer Gary Rydstrom faced the monumental task of inventing voices for animals that had been extinct for 65 million miles. He famously mixed various animal sounds to create the dinosaur roars:
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Here is a comprehensive look at why Jurassic Park (1993) in dual audio continues to be highly sought after, how it shaped global cinema, and what to consider regarding its technical formats. The Global Impact of Jurassic Park (1993)
Official dual audio DVDs/Blu-rays are rare. Most available files are fan-muxed —meaning a fan took the English video and merged it with a dub from a separate source (VHS, DVD, or broadcast).