The steps to remove the background sound from the video and extract pure vocals are as follows:

1. First save the video locally, and then open this excellent audio editing and conversion Find the audio extraction function, check the saved video, and click Next.

2. Then the audio in the video is extracted. We can directly set it as a mobile phone ringtone, and we can continue to edit, such as audio cropping, format conversion, channel conversion, etc.

3. After the audio is extracted, if you want to separate the vocals and accompaniment, find the vocal extraction and accompaniment production functions in more tools.

4. Try vocal extraction first. You can see the audio file just extracted in local music. After selecting it and clicking Next, we will get a cappella vocal.

5. Next, to extract the accompaniment, you still need to check the audio file first, and then directly extract it in the next step. These audios are saved in the file library and we can edit them at any time.