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Hak5 USB Rubber Ducky Piano Player

Script that converts music notation written in tracker-like style into payload code for the Hak5 USB Rubber Ducky

Demo video!

Usage

Runs on Python 3.x.

usage: piano_player.py [-h] [-p] NOTES_FILE PAYLOAD_FILE

positional arguments:
  NOTES_FILE        Path to notes file
  PAYLOAD_FILE      Save payload code to this file

optional arguments:
  -h, --help        show this help message and exit
  -p, --press-mode  Deploy with press mode

Example:

$ python3 piano_player.py notes.txt payload.txt

First, create the notes file. Then run the tool which creates the payload code file. You can then copy and paste that code into the HAK5 payload encoder.

See example notes and payload files in the examples directory.

Notes file format

The notes file looks like this:

50ms
https://www.onlinepianist.com/virtual-piano
c-3=q c#3=2 d-3=w d#3=3 e-3=e f-3=r f#3=5 g-3=t g#3=6 a-3=y a#3=7 b-3=u c-4=i c#4=9 d-4=o d#4=0 e-4=p f-4=z f#4=s g-4=x g#4=d a-4=c a#4=f b-4=v c-5=b c#5=h d-5=n d#5=j e-5=m f-5=, f#5=l g-5=. g#5=; a-5=/ a#5='

d-3  f#3  e-5
d-3  f#3  e-5
---  ---  ---
d-3  f#3  e-5
---  ---  ---
d-3  f#3  c-5
d-3  f#3  e-5
---  ---  ---
g-3  b-3  g-5
---  ---  ---
---  ---  ---
---  ---  ---
g-3  ---  g-4

Line 1: Tick duration (more on this later)
Line 2: URL of the piano (or other virtual instrument) app
Line 3: Space-separated note maps. Left hand side is the actual note, right hand is the corresponding keyboard keypress
Line 4: Leave blank
Line 5 until end: Notes and rests in tracker-like notation

About the tracker-like notation

I thought an easy way to write music is something reminiscent of tracker interface where notes are played by rows. All notes in the same row are played "simultaneously" (or in this case, gives the illusion that it is).

Each row plays at approximately the tick duration (there will be some accumulated delay depending on number of keys held at the same time, etc.).

You would typically make one row equivalent to the duration of a 16th note in your piece, but this is by no means the rule.

The tracker can have one or more columns ("tracks"), but I have only tested it with up to three. Four or more might introduce significant enough delays to make the tempo unstable.

Each element in the tracker is three characters long. A natural note looks like d-3 and a sharp d#3. Flats can be used too as long as it's declared in the note maps.

A rest is represented as ---.

There should always be two spaces between notes or rests in the same row.

For a very simple example, this is the first two bars of Twinkle, Twinkle, Little Star:

c-4
c-4
g-4
g-4
a-4
a-4
g-4
---

In this case each row is equivalent to a quarter note.

Payload Behavior

Press mode OFF (default)

By default, the generated payload works as such:

Insert rubber ducky into USB port
Default browser is opened and navigates to the piano webapp URL specified in the notes file
Rubber ducky plays the piano

Press mode ON

When press mode is enabled (-p or --press-mode flag), the rubber ducky does not open a browser nor go to the piano webapp URL automatically upon insertion. Instead, the note sequence starts playing only when the rubber ducky button is pressed.

The linked demo video above is operating in press mode.

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