Thus, even if you can visualize the wav form in Audacity (or any other sound editor), it is not easy to « read » the signal.
The attached software (source code provided) will not only display the wave form, but also shape it as a « square » form and eventually provide a textual reading (high for xx ms, low for xx ms, …).
This makes it easier to reproduce (from an arduino) or eventually make a better guess at what the signal (or part of it) actually is.
1-the original wave form
2-the square form
3-a textual reading of the worm
Hope this helps others 🙂