The effective_wpm command is used to enable characters to be generated at a fast rate, whilst increasing the space between characters to make it easier to receive those characters (often known as the Farnsworth Technique).

For a very thorough explanation of Farnsworth Timing check out A Standard for Morse Timing Using the Farnsworth Technique (pdf) by Jon Bloom, courtesy of The Americal Radio Relay League.

  require "cw"

cw do
  wpm           25
  effective_wpm 12
  word_count    4
end


 
  1. Release notes
  2. CW script
  3. About the author
  4. Learning the Alphabet
  5. Five Common Words
  6. Fixed Length Words
  7. Range of Word Lengths
  8. Letter Filtering
  9. Letter and Number Groups
  10. Callsigns
  11. Farnsworth timing
  12. Program output
  13. Book Reading
  14. Book Converting
  15. RSS Feed Reading
  16. Reveal Mode
  17. The cw executable
  18. Config file
  19. Using ebook2cw
  20. audio_dir command
  21. audio_filename command
  22. author command
  23. book_dir command
  24. command_line command
  25. double_words command
  26. → 57. effective_wpm command
  27. ewpm command
  28. frequency command
  29. name command
  30. no_noise command
  31. noise command
  32. print_letters command
  33. quality command
  34. shuffle command
  35. title command
  37. use_ruby_tone command
  38. word_spacing command
  39. wpm command
Tags: commands