Audio problems on laptop?

A couple of weeks ago I was on my laptop in bed and it was on the charger. I then fell asleep while it was still on and charging. I woke up and it was still on the charger I then unplugged it and continued working on my minecraft noteblock studio project except the thing was, the audio was disorientated and crackling. The more complex the movement on my screen was the worse it would happen. I then tried my ear buds and still the same results. I also tried my friends external speakers for his desktop and they still failed! I can't even understand YouTube videos now. Help please! I only got my laptop at Christmas!
What did I do and how do I fix it?
Also I'm running windows 8 64-bit
Asus x102B

Have you tried rebooting your laptop. Sometimes something as simple as that will fix problems. If that doesn't work use the disc your computer came with and re-install the audio drivers. If neither of these things work, you just got the laptop a little over 2 months ago so you should be able to get it repaired free or exchange it for a new one. Hope this helps! There's nothing worse that problems like this.