ChordPro

The ChordPro (also known as Chord) is an ASCII text file format for transcribing songs with chords and lyrics.

The format was originally used for guitar, but is used for variety of other string instruments, such as ukulele, bass guitar or mandolin.

Although this format is legible as it is, there are many popular programs for displaying, transposing and printing.

Files in this format often have extensions such as .crd, .chopro, .pro, .chordpro or .cho.

The newest version of the format is v6.[1]

Screenshot of a song typeset by ChordPro

Basic Input Format

ChordPro file format contains chords in square brackets within song lyrics:

What [Em]child is [G]this, who, [D]laid to rest
On [Em]Mary's [Am]lap, is [B]sleeping?
Whom [Em]angels [G]greet with [D]anthems sweet,
While [Em]shepherds [B]watch are [Esus]keep[Em]ing?

Programs convert this format to:

        Em          G           D 
What 	child is 	this, who, 	laid to rest

    Em      Am 	        B 
On 	Mary's 	lap, is 	sleeping?

        Em 	    G 	        D 
Whom 	angels 	greet with 	anthems sweet,

        Em 	        B 	        Esus 	Em 
While 	shepherds 	watch are 	keep	ing?

Output often significantly varies by program, software platform, output media etc.

Directives

ChordPro format allows users to mark sections of a song, such as Title, Subtitle, Key, Time, Chorus etc. through special keywords enclosed by curly brackets ({ and }) called directives. Some directives change the output, while others are not displayed and are primarily used to keep track of meta-data.

{title: What Child Is This?} 
{subtitle: Traditional Christmas Song}
{key: Em}
{lyricist: William Dix, 1837-1898}
{composer: GREENSLEEVES, a 17th Century English Air}
{time: 6/8}
{ccli: 2766502}
# This song is believed to be in the public domain. More information can be found at:
#   http://www.pdinfo.com/PD-Music-Genres/PD-Christmas-Songs.php
#   http://www.ccli.com/Licenseholder/Search/SongSearch.aspx?s=2766502

[2]

History

In June 1991 Martin Leclerc and Mario Dorion created the Chord program and source file notation format. For several years there was no active development of the software. In 2007 Johan Vromans and Adam Monsen revived the project under a new name Chordii, supporting ChordPro format version 4. In 2015 Johan Vromans started yet another re-write of the tool and called it ChordPro. This release supports ChordPro format version 5 and is in active development.

References
  1. "ChordPro Release info". www.chordpro.org. Retrieved 2020-11-04.
  2. https://github.com/pathawks/Christmas-Songs/blob/master/What%20Child%20Is%20This.cho


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