Interference when listening to music through headphone socket :mad:

[iW00t]

I just noticed that if I am listening to something on my MacBook Pro using iTunes, when the song is starting you would hear a whirring/buzz/static sound that comes on and off for a couple seconds, before the song begins.

Is it normal?

 

[Eraserhead]

I'd guess its the HD spinning up, though I can't tell myself...

 

[mad jew]

Could it be the same as this problem?