Press "OK" to save settings and close window or "Cancel" to close window without saving.VID & PID sets as "0000" means default non-USB input audio device, for example integrated Realtek microphone input.
If your device is not in the list, check the "Manual" box and set VID & PID values manually (find it in "Device manager"). Select the device connected to your guitar.
Patches for Rocksmith are rare but whenever it’s done, there is usually an awesome new feature added in, and this time the Update included Microphone mode, which will allow Acoustic Guitar Players to play Rocksmith 2014 without the requirement of a Pickup for the Real Tone Cable.