Step 1:Go to http://audacity.sourceforge.net/ to download and install Audacity. Step 2:Run Rocksmith 2014 and make sure Audio Exclusivity is turned off in the Options menu, then quit. Step 3:Open up the Recording Devices tab of the Sound Control Panel (Easily done by right clicking on the speaker icon in the system tray and selecting Recording Devices. Step 4:Right click inside the Recording Devices list and ask it to Show Disabled Devices Step 5:Find the Stereo Mix disabled device and enable it