embed_mid

A quick project to be able to convert and play MIDI files on embedded devices. It plays all the notes as square waves, ignoring the percussion channel. It supports an arbitrary amount of simultaneous notes. This should be trivial to include in your own projects. See main.c for usage.

It currently generates uint8 samples, this should be trivial to change.

Requirements

• player.c and player.h has no dependencies.

• convert.py requires mido to read MIDI files:

  pip3 install --user mido

Running it as is.

The player uses a simplified song format. You must convert your MIDI files first.

./convert.py MIDIFILE > songs.h && make [run/wav/mp3]

The reference implementation in main.c simply writes the audio samples to stdout. Ensure aplay is installed to be able to hear the output if you make run it.

The Makefile also have the targets wav and mp3 which will create a out.filetype. These require sox and lame to be installed respectively.

TODOs

• Add support for playing multiple songs? (non-global player state)

License

MIT, do whatever