Audio Crossword Clues

Crosswords in newspapers or magazines could have some of the clues in the form of sounds like a cow mooing or a hammer pounding a nail, thunder, sneezing, etc. Just for variety. How to provide the sound to go with newspaper crosswords? I did some experiments with printed variable-width lines like the optical sound tracks on movie film, but that doesn't look promising because printed ink resolution is not nearly as good as in film. I was thinking you could drag a pen-sized reader with audio output. To evaluate whether it is even interesting to do, I've put together a test. It is not as simple as I had planned, because you need a smart phone. See the link below if you want to try the two examples. To actually do the puzzles you will need to do a screen capture and print to get a paper copy.