[Elecraft] CW noise and variations

[P.J.Hicks]

AC7AC, 
  
Some months ago I was looking at keyers and Arduino variations of keyers and came across an article that said the author had built a keyer and generated code for adding small random timing variations in the character stream and characters themselves that made the code sound more "human". I can't for the life of me find it again but it was interesting. Maybe someone here knows the article or can find it??? 
  
PJH, N7PXY