DTS (Digital Theater Systems) and Dolby Digital (AC-3) are the two most famous audio codec used in professional cinema and home theater system to record and play back multi-channel high-definition audio.
Here is a easy way to decode DTS to AC3 to hepl you.
This way also applies to convert DTS to MP3, WAV, AAC, Flac, etc and MP3, WAV, AAC, Flac, etc to DTS.