V8 Bluetooth sound card can connect musical instruments. 1 Insert one end of the transmission line into the sound card, the other end into the sound card, connect the USB port of the computer and the sound card with the USB data cable configured by the sound card, connect the small end to the USB port of the sound card, and connect the other end to the USB port of the computer, and then insert the speaker cable into the output 2 of the external sound card.