Extension:Score

MediaWiki extensions manual

Score Release status: stable
Implementation	Tag
Description	Allows rendering of musical scores with LilyPond
Author(s)	Alexander Klauer, Étienne Beaulé
Latest version	0.3.0 (2019-03-23)
MediaWiki	1.36+
PHP	5.3+
License	GNU General Public License 3.0 or later
Download	Download extension Git [?]: Download Git master browse repository (GitHub) commit history repository contributors (GitHub) code review README.md
Parameters $wgScorePath $wgScoreAbc2Ly $wgScoreFluidsynth $wgScoreLame $wgScoreEnvironment $wgScoreLilyPond $wgWikibaseMusicalNotationLineWidthInches $wgScoreImageMagickConvert $wgScoreLilyPondFakeVersion $wgScoreFileBackend $wgScoreDirectory $wgScoreTrim $wgScoreGhostscript $wgMusicalNotationEnableWikibaseDataType $wgScoreOfferSourceDownload $wgScoreMaxLength $wgScoreDebugOutput $wgScoreUseSvg $wgScoreDisableExec $wgScoreSafeMode $wgScoreSoundfont
Tags score
Hooks used ParserFirstCallInit SoftwareInfo WikibaseClientDataTypes WikibaseRepoDataTypes
Quarterly downloads	30 (Ranked 103rd)
Public wikis using	918 (Ranked 265th)
Translate the Score extension if it is available at translatewiki.net
Issues	Open tasks · Report a bug

The Score extension allows the rendering of musical scores as PNG images using LilyPond and can also transform them into audio and MIDI files.

Acknowledgements

• The original Extension:LilyPond was written by Johannes E. Schindelin.
• This extension is based on a code review of Extension:LilyPond by Tim Starling.
• The original Extension:ABC was written by River Tarnell.

Usage

After setup, you can embed simple LilyPond notation into your wikitext inside a ‎<score>...‎</score> tag. For example:

<score>\relative c' { f d f a d f e d cis a cis e a g f e }</score>

yields:

You may also specify attributes to the score tags in the general form

<score attribute1="value1" attribute2="value2">…</score>.

For example:

<score sound="1">\relative c' { f d f a d f e d cis a cis e a g f e }</score>

yields:

The following attributes are available:

Attribute	Allowed values	Effect
lang	ABC, lilypond (default)	Sets the score language. For example, to provide a score in ABC notation, you might use: <score lang="ABC"> X:1 M:C L:1/4 K:C C, D, E, F,|G, A, B, C|D E F G|A B c d| e f g a|b c' d' e'|f' g' a' b'|] </score>
midi		obsolete This used to control whether the rendered score image linked to a MIDI file.
override_midi	Known file name, that is, if override_midi="name" is given, [[File:name]] does not yield a red link	(deprecated) Instead you can add a [[File:superior midi filename.mid]] wikilink after the closing ‎</score> tag. Uses the specified MIDI file instead of generating one with LilyPond. Use this attribute together with the midi attribute (see before) or the sound attribute (see later). This attribute is useful if you already have a MIDI file whose quality is superior to what would be generated by LilyPond.
override_audio	Known file name, that is, if override_audio="name" is given, [[File:Name]] does not yield a red link	(deprecated) Instead you can add a [[File:superior audio filename.oga]] wikilink after the closing ‎</score> tag. Embeds the media specified by the file name in the HTML after the score image(s). This is an alternative to the sound attribute (see further). It can, for example, be useful if you have a suitable audio file of superior quality compared with the auto-generated audio file. Of course, you can still omit both attributes in this case and add the file manually to the page, if you prefer.
override_ogg		Doubly-deprecated alias for override_audio.
raw	0 (default), 1	If set to 1, the score code is interpreted as a complete LilyPond file. Use this option if you want to create more complex scores. If the score language (lang attribute) is not set to lilypond, this attribute is ignored. By default (when raw=0), provided code is wrapped in a \score{...} block, along with default \layout{...} and \midi{...} blocks, if not already provided.
sound	0 (default), 1	If set to 1, an audio file will be generated for the score, provided you installed and configured Extension:TimedMediaHandler . An audio player will be embedded in the HTML after the score image(s).
vorbis	0 (default), 1	(deprecated) Alias for sound.

The LilyPond language

Lyrics may be added like this:

<score>\relative c'' { \time 4/4 \key c \major 
c4 g8 g a4 g r b^> c^> r \bar "|." } 
\addlyrics { Shave and a hair -- cut: two bits. }</score>

For advanced users, the \set Staff.midiInstrument command can be used to change the MIDI instrument for the sound.

Prerequisites

The following packages are recommended:

• LilyPond
• Ghostscript
• ImageMagick
• FluidSynth
• Firejail

This extension uses LilyPond to render score images, so you need a working LilyPond installation (Special:Version displays the LilyPond version). If you install LilyPond from a package, Ghostscript will also be installed, since LilyPond depends on Ghostscript. ImageMagick should be installed to trim the images, otherwise they will contain an excessive amount of whitespace.

For security reasons, it is highly recommended to install firejail to further restrict what LilyPond and Ghostscript can do if untrusted users are allowed to edit your wiki.

The extension is also capable of creating audio files from the MIDI files generated by LilyPond. If you want to make use of this functionality, you need to have Extension:TimedMediaHandler installed.

FluidSynth is the preferred method to convert MIDI files to audio files, however TiMidity++ is also supported.

Security concerns

Use Shellbox to secure LilyPond to protect your wiki!

Score uses LilyPond in safe mode, however there are known unfixed safe mode escape vulnerabilities leading to arbitrary execution.

If you don't absolutely trust everyone who has editing privileges on your wiki, it is strongly recommended to set up containment of lilypond using Shellbox . See Shellbox#Server setup for details on how to set up the contained server, and below for configuring MediaWiki to use it. Also, ensure you're using a recent version of LilyPond (2.22.0+) or a distribution package (e.g. from Debian) that has security fixes. Keep safe mode enabled, even with containment as an extra layer of defense. Certain functionality will not work in safe mode, the fix for that is to modify LilyPond to allow that functionality in safe mode.

Installation

See the extension's README.md for detailed installation instructions.

• Download and move the extracted Score folder to your extensions/ directory.
  Developers and code contributors should install the extension from Git instead, using:cd extensions/
git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/Score
• Add the following code at the bottom of your LocalSettings.php file:

  wfLoadExtension( 'Score' );
  $wgScoreTrim = true;
  $wgImageMagickConvertCommand = '/usr/bin/convert';
  $wgShellboxUrl = '... address to Shellbox ...';
  $wgShellboxSecretKey = '... your secret key ...';
  

• Create a subdirectory named lilypond in your $wgUploadDirectory (usually the directory named images in your MediaWiki directory). Make sure the directory is writable by your Web server.
•  Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

Configuration

Here are some of the extension's global configuration parameters.

$wgScoreLilyPond

Set $wgScoreLilyPond to the path to your LilyPond executable (typically /usr/bin/lilypond or /usr/local/bin/lilypond).

$wgScoreTrim

The $wgScoreTrim is a boolean which defaults to the value of $wgUseImageMagick. If true, the resulting score PNG images are trimmed with ImageMagick. If you don't want trimming, or don't want to install ImageMagick, set $wgScoreTrim to false.

$wgScoreAbc2Ly

Set $wgScoreAbc2Ly to the path of your ABC to LilyPond converter executable (typically /usr/bin/abc2ly or /usr/local/bin/abc2ly).

$wgScoreFluidsynth

Set $wgScoreFluidsynth to the path of your Fluidsynth executable (typically /usr/bin/fluidsynth or /usr/local/bin/fluidsynth).

$wgScoreSoundfont

Set $wgScoreSoundfont to the path of your soundfont file (typically /usr/share/sounds/sf2/FluidR3_GM.sf2 or /usr/share/sounds/sf2/FluidR3_GS.sf2).

$wgScoreLame

Set $wgScoreLame to the path of your Lame executable (typically /usr/bin/lame or /usr/local/bin/lame). Required if the generated audio file should be a MP3.

Remarks

This extension runs various binaries in a Shellbox to provide some security. You may have to increase $wgMaxShellMemory if you get "out of memory" errors.

Finding scores

Pages with scores on them will have the "score" page property set. Using Special:PagesWithProp, you can find pages that have scores. (Example query for the English Wikipedia.)

See also

• Help:Score on English Wikipedia and Help:Sheet music on Wikisource have more examples of LilyPond syntax.
• Vexflow Open source SVG/Canvas music renderer
• LilyPond notation
• ABC notation
• vexflow github repository