# ABC Music Notation
The input to abcjs is mostly standard ABC Music Notation. That notation is described here:
The working document for the standard is ABC Standardopen in new window
In addition, there are many informal additions, particularly with new
%% directives, that are supported to be compatible with other ABC software.
# Subtractions from the standard
We've made an attempt to be compatible with other ABC software, but there are some exceptions.
Some of the things that are supported by other packages are specific to that package's environment and don't apply to a web-based solution. Those features are not supported.
Here is a list of formatting options that will probably not be supported:
%%abc %%abc2pscompat %%abcm2ps %%autoclef %%beginps %%beginsvg %%bgcolor %%break %%breaklimit %%breakoneoln %%clip %%deco %%decoration %%eps %%format %%fullsvg %%map %%micronewps %%pango %%pdfmark %%ps %%select %%tune %%voicemap
Some of the things that are supported by other packages we've just not gotten around to supporting yet. If you run into a feature that you would like to see, let us know.
# Additions to the standard
# Alternate note heads:
In both the K: and the V: element, you can include the parameter:
style=rhythm style=harmonic style=x style=normal style=triangle
You can also use the above as a decoration to a single note to affect just that note:
This changes the note heads to a different shape.
Here's a sample:
X:1 T:alternate heads M:C L:1/8 U:n=!style=normal! K:C treble style=rhythm "Am" BBBB B2 B>B | "Dm" B2 B/B/B "C" B4 |"Am" B2 nGnB B2 nGnA | "Dm" nDB/B/ nDB/B/ "C" nCB/B/ nCB/B/ |B8| B0 B0 B0 B0 |] %%text This translates to: [M:C][K:style=normal] [A,EAce][A,EAce][A,EAce][A,EAce] [A,EAce]2 [A,EAce]>[A,EAce] |[DAdf]2 [DAdf]/[DAdf]/[DAdf] [CEGce]4 |[A,EAce]2 GA [A,EAce] GA |D[DAdf]/[DAdf]/ D[DAdf]/[DAdf]/ C [CEGce]/[CEGce]/ C[CEGce]/[CEGce]/ |[CEGce]8 | [CEGce]2 [CEGce]2 [CEGce]2 [CEGce]2 |] GAB2 !style=harmonic![gb]4|GAB2 [K: style=harmonic]gbgb| [K: style=x] C/A,/ C/C/E C/zz2| w:Rock-y did-nt like that
A new decoration is supported:
# Chord Break:
If you want to skip a chord, then use one of the following as the chord:
"^break" "^(break)" "^no chord" "^n.c." "^tacet"
These are case-insensitive.
To arbitrarily add the class "mark" to the next note, you can use the decoration: