If your computer does not recognize the DD-500 as a Class-Compliant USB device, you will need to use the DD-500's USB driver. Before using this driver, you must set your DD-500's USB MODE parameter setting to "VENDOR".
Here are the steps to do this:
1. Press EDIT.
2. Press the Down Arrow to select: SYSTEM.
3. Press EDIT.
4. Press the Down Arrow to select: USB MODE.
5. Turn TIME/VALUE knob to select: VENDOR.