Here is an easier way to extract audio from DVD: using a DVD ripper or converter and choose mp3 or other audio format ...
I'd expect that a classical music listener will be after a lossless audio rip, as Ki Choi mentions:
... I want to extract just the audio data in its highest resolution ...
so, mp3 format won't cut it.
Although MC may require a bit of manipulation, it does offer a way of extracting audio in pristine condition without downsampling. Given MC's heritage in audiophile standard sound, I'm keen to see fringe improvement of existing capability. Some of the advice provided in the links mentioned, would have got me a lot closer to the objective of lossless, high quality audio rip from DVD.
With Chapter information, another option is to set up a .cue file that can be matched to the .wav / .flac / .ape file that's ripped. Effectively, that's what particles are doing but at a video level.