There is only one other time I have noticed a cool visualisation effect and that was toward the end of a "Garbage" song called "Sleep Together". About 4 minutes in there is a sound that sweeps from the high frequencies to the low frequencies.

I just checked that one out (I've got that album) and it does look kind of cool in SpectroFlip.

A similar (but more striking and pronounced) effect can be found in Madonna's song "Ray of Light". It happens a few times in the song, mostly just after the bridge around 3:20.

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Tony Fabris