Choppy audio playback on Chrome
I know this was from a while ago, but I had a similar issue and stumbled across this temporary fix. By default, Chrome launches with the wrong audio buffer rate. You can manually set it to the right one by launching Chrome through terminal, but that's a pain in the butt to do every time. So you can create a shortcut with automater to do it for you:


Open Automater 
Choose "Application"
Search for "Run Shell Script"
Drag the "Run Shell Script" action into the place to the left
Paste the following into the Run Shell Script text box:


open /Applications/Google\ Chrome.app --args --audio-buffer-size=2048

Then just save that application, quit chrome, and open it to start chrome with the right buffer.

NOTE: I've noticed that this only works for a while. If you, for example, close your laptop and open it back up, the audio may not work correctly again. No idea why.