On Jul 2,  5:26am, Mason Loring Bliss wrote:
} 
} Hmph. I'm up again, of course, as a consequence of the tune. It's a bit more
} aurally interesting than anything I can feed into spkr0 by hand. I'm wondering
} if something was damaged when the power went out, and is using some sort of
} whack-o tune to notify me, kind of like the Mac chime of death, only with the

     I've seen some high-end CPU fans that can do this.  They are
connected between the motherboard speaker connection and the speaker.
They have a sensor that detects if the fan is turning.  If the fan
stops turning, it starts playing the tune to let you know.  Since this
is an aftermarket item, it may not be mentioned in any of your
manuals.

}-- End of excerpt from Mason Loring Bliss