It’s today’s Google Doodle:
https://www.google.com/webhp?fpdoodle=1

You enter a theme, the Doodle harmonizes it for you, presumably imitating Bach’s style using algorithm trained by Bach’s compositions.

Very fun.

Here's mine. The theme is stolen from an homage to Rachmaninoff.

https://g.co/doodle/asyvty

I'm trying it out with a few well-known themes/snippets:

https://g.co/doodle/gx5tyz

https://g.co/doodle/p86zrb (Oops I Did It Again)

https://g.co/doodle/wk6wqh

https://g.co/doodle/rwkmta (Stayin' Alive)

https://g.co/doodle/564nww (GangNam Style)

Seems like the Slate article is criticizing: “it doesn’t sound like Bach.” With that I would agree. Still, it’s just for a bit of fun and I don’t take it seriously. The AI team will collect a ton of new feedback to learn on. Things will get better.