Ah! Vanilla Fudge reminded me of the extremely fine thing that is songs of Alvin and chipmunks, slowed down 2x: https://www.youtube.com/watch?v=TU-MYe0SL9Q and https://www.youtube.com/watch?v=zpofYybjXgQ (these are probably compilations from other vids).

They're much much better with bass boosted somewhat with a browser EQ plugin, or with VLC—but the higher end must be kept, for the voices.

The original ‘Diamond Dolls’ is gorgeous in this rendition, and some others like ‘My Sharona,’ ‘Good Girls Don't,’ or ‘How Do I Make You,’ might be the best ways to play such songs.

After those vids, I had to go through their song collections—and found some other gems, like ‘I Fought The Law,’ ‘Blitzkrieg Bop,’ ‘Whip It,’ the incredibly cool ‘I'm Too Sexy,’ or also original ‘I Wish I Could Speak French.’