If they’re all tagged correctly, then wouldn’t you be able to merely match duplicates based on tags?
https://dupeguru.com/does-dupeguru-support-scanning-music-files/ (dupeGuru is open source) can help with that.
Or filter on open source for the alternatives (such as Czkawka ) to dupeGuru here for alternatives: https://alternativeto.net/software/dupeguru/
Oh, I just found a table of options on https://github.com/qarmin/czkawka with some saying they support audio content matching.
Weird: https://czkawka.com/ has cancer; do not visit it. Seems https://github.com/qarmin/czkawka is the real website.