[SurroundSound] Query re extracting DTS / AC3 from a quad DVDA

I've just noticed a problem when I try to extract the audio from a Quad conversion that's presented as both DTS and AC3 on a DVDA. DVDAudio explorer and Audio extractor seem to output OK, and show as 4.0 but lack surround audio. (Wav, flac, mlp I don't get an option for DTS/AC3 and none appear in the output folder) I can play the iso fine but ideally would just save the audio on NAS and simply select from there.

Am I missing some simple setting or do I need to use another app to differentiate the audio streams and output to files?

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