mystery music streaming over my imac...why?

[protomac]

not connected to net. the music isn't in my itunes. it feels like it is coming from pandora - but i checked.. It isn't. i can't stop it. Viral music...?

 

[BlueRevolution]

Is it a Dashboard widget?

 

[Danbury]

mystery tune when iMac unplugged, even, always at midnight

For the past two weeks my iMac, exactly at midnight PST plays a computer generated tune five times and turns off. I have not only shut the computer off, but unplugged it and it still plays.

I changed my time zone from PST to EST to see if would happen at 9 P.M. PST, and before I'm in bed, sleeping.

Is anyone out there and exorcist? It is possessed.