What should I do if my speakers are crackling when connected to my laptop but not any other devices?

I’m pretty sure this only started today, or I only noticed it today. I have a set of logitech external speakers, like this, and they are awesome. I have had them since the start of last year and they have been so good to me.

Just now though, when the auxiliary is plugged into the earphone jack of my laptop, I can hear a faint, constant static crackliness coming from them. It gets louder when I turn the volume up, but it’s not louder than the music or anything, just loud enough to be slightly worrying.

I have used them twice at near but not quite maximum volume, for parties, both last year, and there were absolutely no problems and I’ve never heard this static noise from them before.

I thought it might be the cords/wiring, so I plugged the auxiliary cord into both my iPhone and my iPod shuffle but both of those sound perfectly amazing as usual, the same as what it has sounded like from my laptop up until just now.

When I plug my earphones- really good sports ones with extra bass- into the earphone jack of my laptop everything sounds normal, no crackling.

It’s definitely not just the one song or one album or just mp3 or just m4a.

What do I dooooooooooooooooo?

:(