"The first PC game to introduce in-game support for custom soundtracks was Lionhead Studio's Black and White. The 2001 game included an in-game interface for Winamp that enabled the players to play audio tracks from their own playlists. In addition, this would sometimes trigger various reactions from the player's Creature, like dancing or laughing."

Anyone know how this works in more detail? The game's page on wikipedia doesn't mention it.

I don't think even the programmers know how Black & White works.

And there's a non-zero chance that being a Peter Molineux thing that it was all full of horsefeathers.

Don't know either but determining/identifying things like bpm or certain frequencies present in audio tracks should have been possible with relative ease even back then?