What does it mean to crossfade songs?

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Tags

1. #editing
2. #required
3. #smooth
4. #digital
5. #inputs
6. #between
7. #crossfades
8. #audio
9. #makes
10. #turning
11. #dubbing
12. #cumbersome
13. #transition
14. #while
15. #relatively
16. #other
17. #files
18. #tapes
19. #crossfade
20. #production
21. #analog
22. #source
23. #manually
24. #volume
25. #procedure