Morse

Translates text to International Morse code and back (26 letters, 10 figures, 18 signs) and plays it as a 700 Hz tone at 5–30 words per minute, with a rhythm strip. Codes follow ITU-R M.1677-1 (2009): a dash is three dots; gaps are one dot within a letter, three between letters, seven between words. Its !, &, ;, $ and _ are common extensions outside the ITU table.

• Recommendation ITU-R M.1677-1, International Morse code (10/2009)