What are DRM free songs?

Related questions

1. Do you get to keep the games from Humble Bundle monthly?
2. How much does Humble Bundle donate?
3. Do you keep Humble Bundle games forever?
4. What is the Humble Bundle trove?
5. Is Humble Bundle DRM free?
6. What's DRM free songs?
7. Is Humble Bundle non profit?
8. What is a DRM free game?
9. Do you keep Humble Bundle games?
10. What charity does humble bundle support?

Tags

1. #currently
2. #store
3. #tracks
4. #vendors
5. #digital
6. #those
7. #cheaper
8. #purchased
9. #lesser
10. #meaning
11. #under
12. #rights
13. #downloaded
14. #quality
15. #napster
16. #without
17. #online
18. #management
19. #offered
20. #music
21. #itunes
22. #other