/usr/share/tracker-miners/extract-rules/90-gstreamer-audio-generic.rule is in tracker-extract 2.0.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [ExtractorRule]
ModulePath=libextract-gstreamer.so
MimeTypes=audio/*;
FallbackRdfTypes=nmm:MusicPiece;nfo:Audio;
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