If you choose the background music based on the video soundtrack, you need to use music editing software to eliminate human voices, but if you don't want to use the soundtrack and want to use something else, just upload the selected audio directly.

click "add file" to add background music.

If batch conversion is needed, we can directly click "Add Folder" to import all the audio to which background music needs to be added. Set the output path, and we can directly check the default original directory.