If your Rotel product has a back panel input labelled "PC-USB", you can connect your computer to the USB input using a standard USB cable. This would lead to your computer recognizing the Rotel system as an audio device.
Subsequently, it allows you to play music from your computer through your Rotel system.It would be key to mention that If the Rotel device does not appear on the list of sound devices, make sure the USB cable is properly seated on both the computer and the PC-USB input.