1. First, make sure the Sony high-definition music player is charged and turned on.

2. Connect the music player to the computer or power adapter through the USB data cable for charging.

3. Select "Audio Output" in the settings menu of the music player and then select "USBDAC" mode.

4. Connect the USB interface of the music player to the USB interface of the active speaker to ensure that the connection is stable.

5. Open the music player, select the high-definition music file you want to play, and start playing.