What is your speaker test song?

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When I worked in a refurbisher of all things you plugged in I needed a test song to play on speakers to make sure they sound functional.

This became my test song:

If I Apologised from the movie "Mirrormask"

Do you guys have a test song?

Bonus:
My test video for every AV/Home Theater Setup has always been fifth element, I bet you can guess which scene.