Connecting a PC or Mac
By connecting a computer to the USB-DAC port on the rear panel of this unit using a commercially available USB connecting cable, this unit can be used as a D/A converter. link
Before USB connecting this unit to your computer, install the driver software in your computer. link
Download the driver software from the SA-KI RUBY page of the Marantz website.
Use a cable that is 10 ft (3 m) or less to connect to the computer.