RouterOS beeper player
Make your router sing.
Every router carries a beeper. Paste a script and hear it here, before your router does; download it and run it on yours. Or pick a tune from the shelf.
On the router: paste the script into a terminal, or upload the file and run it.
Ask for a tune you may arrange: your own, one out of copyright, or one you are licensed to use.
Paste any beeper script into the editor to hear it.
How it works
One command sounds one tone: :beep frequency=<hertz> length=<time>; the beeper plays one note at a time.
:delay is the clock. A beep starts the tone and returns at once, so every note is a beep followed by a delay of the same length and a small gap.
A tune is a script: a note table, a melody as an array, one function that plays a note. Download any of these and run it in a terminal.