Logic Automator

This has scripts for automating various tasks in Logic Pro X.

Setup

Make sure you have python3 installed and sourced in your .zprofile file (if you are using zsh as your shell).
Make sure Xcode is installed fully.
Run pip install pyobjc atomacos

Running

Transpose: to transpose a song and bounce it by N semitones, run the following command. It exports to MP3 with default settings and overwrites existing files, if any.

python3 transpose.py <path_to_logic_project> <transpose_by> <output_name>
# Example: python3 transpose.py '/path/to/some\ project.logicx' 3 transposed_output

Write MIDI: to create a midi file with a custom sequence of notes, as specified by their MIDI note numbers, use the following command:

python3 write_midi.py <notes_array> <output_name>
# Example: python3 write_midi.py '[0, 4, 5]' '/path/to/some\ midi.mid'

Bounce MIDI: to export a midi file as an MP3 file, use this:

python3 bounce_midi.py \
    <path_to_logic_project> \
    <path_to_midi_file> \
    <output_name> \
    (<instrument> (<preset>))
# Example: python3 bounce_midi.py \
#   '/path/to/some\ project.logicx' \
#   '/path/to/some\ midi.mid' \
#   'out' \
#   '["AU Instruments", "Native Instruments", "Kontakt", "Stereo"]' \
#   'my_preset'

Development

Unfortunately, the package this depends on (atomacos) has a number of major issues and Logic's interface keeps changing to make this code obsolete. Since this script has fulfilled my needs to date, I am leaving things here. If you have fixes that crop up moving forward, feel free to submit a pull request.

Known issues:

When importing a MIDI file, atomacos sometimes replaces slashes with question marks and crashes. This is not always the case, but it occasionally occurs. This is a bug in atomacos, not this. A workaround is necessary in the future.
Sometimes the bounce menu does not appear.

Linting

First, set up the git hooks:

git config --local core.hooksPath .githooks/

Then, install dev dependencies so you can lint your files as you go:

pip install black

Acknowledgements

Most of the code for bouncing files is adapted from psobot's solution, but it is updated to work with Python 3 and newer versions of Logic.

douglasjarquin / logic-automator