Pattern Name: 7.1 Channel Plug the Sound Adapter into your USB port and then plug your headphones into the Adapter. 7.1 Channel sound without the investment in a whole set of speakers! Plug this Adapter into a USB port on the front and use the headphone jack (for output) or the microphone jack (for input). The USB Virtual 7.1 Channel Sound Adapter is a highly flexible audio interface which can be used either with desktop or notebook systems.