The latest Supra USB cable is fitted with a USB Type C connector at one end and a choice of connectors at the other (such as Type C as well as the older Type A or Type B connectors).
As such, it is designed to act as a digital audio cable, between a computer/streamer and a D-to-A convertor (a "DAC"), carrying audio signals from the former.
In this way, you can play your music stored on your computer or mobile phone/tablet or media player, via your hi-fi system (if the aforementioned DAC is connected to an audio input of your stereo system).