SOLUTION to the static audio issue
A while ago, I was having a problem where I could hear static whenever audio was played regardless if I used headphones or speakers.
The static sound is not a hardware issue. It comes from the internet browser Google Chrome. The issue is that the computer is using the integrated flash plug-in that comes with Chrome rather than using an actual Flash Player from the computer.
To fix this (if this is occuring in Chrome), this is what I have done:
1) Open Chrome and type "chrome://plugins/" without the quotation marks into the address bar
2) Disable the Adobe Flash Player
3) Download Adobe Flash Player for Google Chrome (Mac version)
This should fix the problem, as the Flash player is part of the computer and not of the browser.
I have contacted Applecare to tell them about this issue and solution with developers to see if there can be a fix for integrated Flash plug-ins.
I hope that this solves the problem for those having the static audio issue!
Cheers!