First, import your video files into DemoCreator program; seconed, drag and drop your video to the timeline; third, right click to select the "audio detach"; finally, export and share it.
We will share with you such software that can help to fulfill your desire to extract audio from video.
1. Wondershare DemoCreator
2. Windows Movie Maker
3. Audacity
4. VLC
5. Free Audio Editor
6. Audio Converter
7. Bigasoft Total Video Converter
8. Apowersoft Free Online Video Converter