The Invention of the CD

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Across
  1. 3. A collection of songs
  2. 4. Protective layer on a disc
  3. 6. To access information from a CD
  4. 9. Exclusive rights for an invention
  5. 11. Type of sound encoding
  6. 14. Relating to light and lenses
  7. 15. Information stored on a CD
  8. 16. Device that plays CDs
  9. 18. Small, taking little space
  10. 20. To rotate, as a disc
  11. 23. A dramatic change
  12. 24. Tracks played on a CD
  13. 25. Tiny indentations on a CD
  14. 27. Part of a CD reader
  15. 28. Level of excellence, like sound
Down
  1. 1. Place for keeping data
  2. 2. Sound, as on a CD
  3. 5. To create something new
  4. 7. Compact Disc abbreviation
  5. 8. Flat circular medium
  6. 9. Material used for a CD
  7. 10. A mistake, often corrected by CD tech
  8. 12. Light beam in a player
  9. 13. A song on an album
  10. 17. Flat areas between pits
  11. 19. Layer of reflective material
  12. 20. What a CD produces
  13. 21. Dutch electronics company
  14. 22. A ray of light
  15. 26. Japanese electronics company