First thing to do is make an account at the livestream website. After that set-up a channel. After that download the procaster http://www.livestream.com/platform/procaster to your extra pc. In this program you login with your account details of the livestream website. It will automatically choose the channel that you’ve created.
With an audio cable you connect your controller to the line-in of your pc. Go to preferences and set it up, audio part is most important. If you click ‘audio’ and on that page ‘open audio mixer’ you get a new screen. Select the built in input and check if you get a sound signal. (You can also add a camera, like a webcam or something) Save the preferences and click on go live. Now you’re streaming!