midi2audio 0.1.1

pip

You can install this package via pip.

pip install midi2audio

Or for development (changes in code take effect without reinstalling):

git clone https://github.com/bzamecnik/midi2audio
pip install -e midi2audio

OS X

I’d recommend adding the non-default libsndfile which supports output to FLAC and wide variety of audio formats. Otherwise only WAV, raw and a few other will be supported.

For Mac OS X we provide a script install_fluidsynth_with_soundfonts_osx.sh to automatically install FluidSynth with libsndfile and a basic sound font (Fluid R3 GM) and symlink it so that it’s recognized as a default sound font for this module. Note it it install installed via pip as another entry point.

install_fluidsynth_with_soundfonts_osx.sh

Or install it manually:

brew install fluidsynth --with-libsndfile
mkdir -p ~/.fluidsynth
ln -s /path/to/my/sound_font.sf2 ~/.fluidsynth/default_sound_font.sf2

Check the script how to install a few additional (nice but bigger) sound fonts which are not installed by default.

Python

from midi2audio import FluidSynth

Play MIDI:

FluidSynth().play_midi('input.mid')

Synthesize MIDI to audio:

# using the default sound font in 44100 Hz sample rate
fs = FluidSynth()
fs.midi_to_audio('input.mid', 'output.wav')

# FLAC, a lossless codec, is supported as well (and recommended to be used)
fs.midi_to_audio('input.mid', 'output.flac')

Change the defaults:

# use a custom sound font
FluidSynth('sound_font.sf2')

# use a custom sample rate
FluidSynth(sample_rate=22050)

Command line interface

A shell sugars midi2audio and midiplay are provided instead of more verbose python -m midi2audio.

# play MIDI
$ midiplay input.mid

# synthesize MIDI to audio
$ midi2audio input.mid output.wav

# also to FLAC
$ midi2audio input.mid output.flac

# custom sound font
$ midi2audio -s sound_font.sf2 input.mid output.flac

# custom sample rate
$ midi2audio -r 22050 input.mid output.flac

Shoulders of giants

Thanks to the authors of FluidSynth for a nice command-line MIDI synthesizer!

Support the project

Need some consulting or coding work regarding audio processing, machine learning or big data? Drop me a message via email or LinkedIn. Or just say hello :).