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I've found that the easiest way to extract audio data from a Blu-ray movie is to rip the file using MakeMKV and then use FFMPEG to convert the audio data to my codec of choice be it wav, aac, opus, etc. FFMPEG takes care of identifying the right codec to decode.

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Does it work with the proprietary stream formats like DTS? I believe I am using some plugin for Audacity for that, but I hate doing the actual sampling in Audacity so it then gets loaded into another editor.

Yes, it works with DTS. Here is the full list of supported codecs: https://www.ffmpeg.org/ffmpeg-all.html#Audio-Codecs

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