txt2musicxml

A simple tool to convert chords from text to musicxml. Musicxml files can be opened with most notation software (for example MuseScore, which is free and open source).

Install

use pipx

pipx install txt2musicxml

Usage

pipe a string of chords into the cli

echo -n 'Cmaj7 A7 | Dm9 G7b9,13 |' | txt2musicxml

or redirect input/output from/to a file

txt2musicxml < path/to/Thriller.crd > path/to/Thriller.musicxml

Syntax Example

Aguas de Marco - Elis Regina & Tom Jobim
---

Bb/Ab | % |
Bb/Ab | Gm6 Cm7b5/Gb |
Bbmaj7/F E9b5 | Ebmaj9 Ab9 |
Bbmaj7 Bb7 | C7/E Ebm6 |
Bbmaj7/F Bb7 | C7/E Ebm6 :||

• More info in SYNTAX.md
• More examples: ./examples/

Export to PDF (with MuseScore)

Install MuseScore 3 and make sure to add mscore to your PATH. Not fully tested with v4. % doesn't work in v3.

TMPSUFFIX=.musicxml; mscore -o path/to/output.pdf =(txt2musicxml < path/to/input.crd)

Developing Locally

Dependencies

In order to change the grammer and regenerate lexer/parser/etc:

• java
• antlr

For other development:

• python ^3.9
  • I suggest using pyenv to manage multiple python versions on your machine
• poetry - to manage virtual env
• Make - to help run useful commands

Updating and Debugging

Grammer is defined in txt2musicxml/grammer/Chords.g4 and txt2musicxml/grammer/FrontMatter.g4. To generate antlr python classes (Lexer, Parser, Visitor, Listener) from the grammer file, run:

antlr4 -Dlanguage=Python3 txt2musicxml/grammer/Chords.g4 -visitor
antlr4 -Dlanguage=Python3 txt2musicxml/grammer/FrontMatter.g4 -visitor

Those classes are direct dependencies of the application, they must exist for the main program to run.

To use the built-in antlr GUI and debug your grammer, first compile those java classes, and then run the gui:

javac txt2musicxml/grammer/.antlr/Chords*.java
javac txt2musicxml/grammer/.antlr/FrontMatter*.java
cd txt2musicxml/grammer/.antlr && grun Chords sheet -gui
# or: cd txt2musicxml/grammer/.antlr && grun FrontMatter front_matter -gui

Then enter some text and hit ^D (on mac) to indicate EOF, and see the parse tree get generated!

NOTE: Chords and sheet are names unique to the program (grammer name, root element), if you change the grammer file, the commands you run should change as well.