MIDI to GCODE

Play a song with a FDM 3D printer. SLA printers don’t have motors, so they cannot play music.

Warning: Be ready to turn off the 3D printer in case the motor reaches
the axis limit.

Usage:

python main.py ...

Args:

-i: Input MIDI file.
-o: Output G-code file.
-p: Pitch multiplier.
-l: Length of axis (currently ignored).
-a: Axis to use e.g. "Y". Normally, the Y axis is loudest.
-r: Axis to use for rests. The "X" and "E"xtruder axes are quietest, but some printers
don’t move the extruder unless it is heated.
--home: Move to home position before playing.

Copy the gcode to the printer and print it.
The gcode flavor is Marlin.

Example command:

python main.py -i a.mid -o a.gcode -a Y -r X --home

How it works:

The 3D printer moves motors, and usually makes noises. These noises are arbitrary in most prints,
but if you move the motors at certain speeds, the resulting sounds may form a song.

The script computes the speeds based on a MIDI file (the song).