1. First of all, the first step is to connect the mobile phone and the sound card with an audio cable, and then use the audio cable with a trademark among the two audio cables standard in the second-generation sound card, and one end with a trademark is connected to the earphone hole of the mobile phone.

2. Next, connect the other end of the audio cable to the "live" jack of the sound card.

3. Then connect the earphone to the "headset" interface of the sound card.

4. Then turn on the computer to check whether the audio channel of the computer is the input and output of the sound card, and then reduce the volume of the microphone appropriately, or insert it into a USB interface.

5. The last step is to check that the connection is successful, and then you can start using it, as shown in the figure below.