Unfortunately, GT Pro 2 cannot input monitor through the software. If you want to use Cakewalk like a real time effects processor you'll need one our products that are capable of input monitoring. We suggest upgrading to Guitar Tracks Pro 4 or SONAR Home Studio, which have this capability. For more information about upgrading call 1-888-CAKEWALK or visit our online store. You can download the latest SONAR demo here.