@nixCraft

I seem to remember finding an Easter egg back when I was studying in my teens in the help files for Borland turbo c++ in the sound library doco, something about:

* Emits a 7-Hz tone for 10 seconds.

True story: 7 Hz is the resonant frequency of a chicken's skull
cavity. This was determined empirically in Australia, where a new
factory generating 7-Hz tones was located too close to a chicken
ranch: When the factory started up, all the chickens died.

Your PC may not be able to emit a 7-Hz tone. */