The Mac startup sound

I switched on my Mac this morning. While it booted I walked to the kitchen to grab some coffee and I heard myself singing:

• It's been seven hours and fifteen days

In case you don't recognize it, that is the opening line of "Nothing compares to you" by Sinead O'Connor.

Now it's not unusual for me to sing small fragments of songs. But I always wonder what triggers a certain song. Especially one that is as old as this one.

It didn't take long to figure it out in this case. The song was triggered by the sound that the Mac makes when you switch it on. It sounds remarkably similar to the start of the song.
Has anyone else noticed this? All I could find in a quick scan, was a comment in this post.

And is it a coincidence? Or is this part of the tribute that the Mac engineers pay to their creation? It sounds like the thing any Mac-head would say to his/her machine: "nothing compares to you".