How do I download just the audio from a YouTube video?

Related questions

1. Can you record live streaming?
2. Is downloading a movie Illegal?
3. How is sound recorded?
4. What is audacity app?
5. Does Audacity work on Linux?
6. How do I record audio on Linux?
7. Is it illegal to download from YouTube?
8. Is YouTube to mp3 safe?
9. Can I record audio from YouTube?
10. How can I download free music from YouTube?

Tags

1. #audio
2. #select
3. #mobile
4. #paste
5. #video
6. #format
7. #starts
8. #search
9. #field
10. #playing
11. #download
12. #device
13. #genyoutube
14. #youtube