...Here, the long rectangles represent cars or trucks that can only move [roll] lengthwise...the goal being to move the red car toward the shaded "exit door".
The proper command to extract the archive and maintain the directory structure is "7z x filename".
Morse Code Utilitiies to convert text messages to & from sound files.
...Tonal frequency or wpm-speed does not seem to matter.
Now includes an inverse commandline app, txt2wav that creates a morse code WAV file from English text.
The proper command to extract the archive and maintain the directory structure is "7z x filename".