Turn on your computer. 2. Use the provided USB cable to connect KeyRig 25 to an available USB port on your computer. 3. Make sure that the power switch on the back of the controller is in the “on” position. ... KeyRig 25 is now ready to be used. NOTE: Advanced Windows XP users who plan to 1.) use the keyboard with more than one audio application at the same time, or 2.) send long SysEx (system exclusive) commands, must install special multi-client drivers. This process is described in the Key Ri