Create a new audio source for Easylife. (You must ensure you have the latest set of drivers installed for your sound card. The default drivers included with Windows may not provide you with this feature).
First, open your audio options. Go Start > Control Panel > Sound.
Now click the Recording tab.
Next you need to show your hidden devices. Right click in the device window and click on Show hidden devices.
Now that your hidden devices are visible, right click on Stereo Mix and click on Enable.
Make sure you have a green tick on Stereo Mix.
Re-start your browser and the source should appear in the Audio Source drop-down box.