1. First open the Bible player. On the player interface, find the "Settings" button, which is usually a gear-shaped icon.

2. Next, enter the music settings: After opening "Settings", find the "Music Settings" or "Background Music" option on the interface, enter the music playback settings page, and on the music settings page, find "Select "Music" or "Add Music" and other options, click to open the music selection interface.

3. Finally, on the music selection interface, you can select your favorite music file. After clicking to select, the player will start playing the selected music file.