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It still worked a few years ago but no longer :( (http://techno.org/electronic-music-guide/)

The Wayback Machine still displays a 2007 version (1900 captures!) ... complete with a sample for each genre ... even musique concrete .

The archive.org variation appears to be missing both samples and descriptions.

A ported version got made over at: https://ishkur.kenxaj.cyou/

Appears to have all the music files and descriptions from a cursory inspection, although missing Tools, Samples, and Sounds.

Gives credit to Ishkur, recommends checking v3, and was made using: https://github.com/igorbrigadir/ishkurs-guide-dataset/

That's what I get for stopping at the front page after it looked just like I remember. :/

Thanks for the other link.