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# SHAPED NOTES

If you intend to only use the usual system of note heads, you can skip over this section on shaped notes. If you wish to use less common note head shapes, like X-shaped notes, rather than normal note heads, or want "shaped note" music that is often used for "Sacred Harp" style music, sometimes also called "fasola notation," then this section will explain how you can do that.

## Headshapes context

The headshapes context is used in conjuction with the noteheads parameter to determine what characters will be used when printing note heads. It is rarely necessary to include a headshapes context in your music, since Mup already has the most common values built in, so generally you just need to use the noteheads parameter to access them. However, it is still important to understand what the headshapes context can contain, to understand how the builtin values work.

The headshapes context defines, for a given head shape name, what specific note head characters to use for the notes of various durations. It contains one or more pairs of strings. The first string in the pair gives a name for a set of note head shapes. The second string contains a space-separated list of the names of 4 note head characters to use for that head shape name. The first shape in the list is used for quarter notes and shorter, the second for half notes, the third for whole notes, and the fourth for double whole notes.

If an upside down version of the character is to be used for stem down notes, the name is prefixed by "u?" (The "u" stands for "upside-down" and the question mark is intended to be mnemonic for the fact that the upside down version will only be used part of the time, namely for stem-down notes.)

As was mentioned above, the most common mappings are already built into Mup. Here is the list of the pre-defined values. Pay particular attention to the first string on each line, since those are the names you will use in the notehead parameter and for overriding chord and note shapes.

"norm" | "4n 2n 1n dblwhole"
"x" | "xnote diamond diamond dwhdiamond"
"allx" | "xnote xnote xnote xnote"
"diam" | "filldiamond diamond diamond dwhdiamond"
"blank" | "blankhead blankhead blankhead blankhead"
"righttri" | "u?fillrighttriangle u?righttriangle u?righttriangle u?dwhrighttriangle"
"isostri" | "fillisostriangle isostriangle isostriangle dwhisostriangle"
"rect" | "fillrectangle rectangle rectangle dwhrectangle"
"pie" | "fillpiewedge piewedge piewedge dwhpiewedge"
"semicirc" | "fillsemicircle semicircle semicircle dwhsemicircle"
"slash" | "fillslashhead slashhead slashhead dwhslashhead"
"allslash" | "fillslashhead fillslashhead fillslashhead fillslashhead"

You can redefine these or define new ones if you wish. The name (the first of the two strings in the pair) can be almost anything you want. The four names in the second string must be taken from the list of valid note head characters given below:

    4n	             2n         1n      dblwhole
    filldiamond          diamond            dwhdiamond
    fillisostriangle     isostriangle       dwhisostriangle
    fillpiewedge         piewedge           dwhpiewedge
    fillrectangle        rectangle          dwhrectangle
    fillrighttriangle    righttriangle      dwhrighttriangle
    ufillrighttriangle   urighttriangle     udwhrighttriangle
    fillsemicircle       semicircle         dwhsemicircle
    fillslashhead        slashhead          dwhslashhead
    xnote
    blankhead

The righttriangle shape names can be prefixed by u? when used in the headshapes context, to indicate the upside down version of them should be used when the stem is down. Note that u? cannot be used on any other note head characters, since none of the others have a corresponding upside down version.

As an example of how you could use the headshapes context, suppose you wished to use xnote for half notes and shorter, and diamond for longer notes. That is different than either of the builtin values "x" or "allx" but you could override one of them:

    headshapes
    	"x" "xnote xnote diamond diamond"

The blankhead does not print any head at all, it just leaves space as if there were a note head. It might be used if for some reason you just want stems.

## Noteheads parameter

The noteheads parameter describes which note head shape to use for each pitch in the scale. It can be specified in score, staff, or voice contexts. If you want to use the same shape for all pitches, (as is the case with standard notation), only one shape name is specified. Thus the default value for this parameter is

    noteheads = "norm"

If you want to use different shapes for different pitches, the noteheads value needs to be a string containing a list of 7 shape names. They are listed from the "tonic" of the major key up the scale, with the key based on the number of sharps or flats in the key signature. The shape names must be from the list of pre-defined head shapes (norm, xnote, diam, blank, righttri, isostri, rect, pie, semicirc, slash), or names that you have given as the first in a pair of strings in the headshapes context.

You can get the most common shaped note system using 4 shapes using:

    noteheads = "righttri norm rect righttri norm rect diam"

There are several shaped notes systems using 7 different shapes. One such system is specified by:

    noteheads = "isostri semicirc diam righttri norm rect pie"

Once the noteheads parameter is set, you specify your music just like you would for standard notation, but Mup will use the appropriate note heads based on your specifications.

    score
       // Use a 7-shaped system.
       noteheads = "isostri semicirc diam righttri norm rect pie"

       // Noteheads are given in order for the major key,
       // so we'll start out with an example in major.
       key = d major

    music

    // Do a descending scale in D major
    1: d+;c+;b;a;
    bar

    1: g;f;e;d;
    dblbar

    score
       // Now we switch to D minor, where the "tonic"
       // will start at the rect and then wrap around.
       key = d minor

    music

    // Do a descending scale in D minor
    1: d+;c+;b;a;
    bar

    1: g;f;e;d;
    bar

## Overriding chord note heads

It is possible to override what note shape to use for a chord, by giving "hs" followed by a head shape name from the headshapes context, inside square brackets. Thus

    	[hs "righttri"]

would use the "righttri" headshape. The specific character to use would be based on the group's duration. In other words, if the chord was a quarter note or shorter, the "fillrighttriangle" note head would be used, but if the chord was a half or whole note, a "righttriangle" note head would be used, and a "dwhrighttriangle" would be used for a double whole note.

The hs specification can be used along with other things that can go in the square brackets. For example,

    	[hs "blank"; len 0]

would use blankheads and no stem, resulting in no chord being printed at all!

## Overriding individual note heads

If you want to override the note head shape to be used for one specific note in a chord, you use hs followed by the head shape name as a string after the note.

    1: cg e+ hs "diam"; f a hs "x" c+; 2ge+;
    bar

## Putting it all together to use shaped notes

In summary, note head shapes can be specified in five different places: per note, per chord, in voice context, in staff context, and in score context. When deciding what note head shape to use, Mup checks for specifications in that order, using the first it finds.

Since fret numbers are used rather than note heads on tablature staffs, the only head shape name that is allowed is "allx." which is used for "muffled" notes.

Here is a simple example of shaped notes, using the common 4-shape system.

    score
    	noteheads = "righttri norm rect righttri norm rect diam"
    	staffs=4
    	key=2#
    	bracket=1-4

    staff 3
    	clef=treble8
    staff 4
    	clef=bass
    music

    1: 2c+;4d+;e+;
    2: 2e;4a;f;
    3: 2e;4f;c;
    4: 2a-;4f-;a-;
    bar

    1: 1d+;
    2: 1f;
    3: 1d;
    4: 1d;
    endbar

Here is an example of using the same note head shape for all pitches, illustrating how the proper version--filled or open--of the note head is used, based on the note's duration.

    score
    	time=8/4
    	beamstyle=2,2,2,2

    music
    1: 8cf;;4;2;1;
    bar

    score noteheads="isostri"
    music
    1: 4ec+;8;;2;1;
    bar

    score noteheads="rect"
    music
    1: 1gc+;4;2;8;;
    bar

    score noteheads="pie"
    music
    1: 8cf;;4;2;1;
    bar

    score noteheads="x"
    music
    1: 4ec+;8;;2;1;
    bar

    score noteheads="slash"
    music
    1: 1gc+;4;2;8;;
    bar

And finally, here is a somewhat silly example that demonstrates how you can use the various shaped notes features to get any kind of note head that Mup supports anywhere you want.

    headshapes
    	// Make some user-defined head shapes.
    	// These combinations don't really make sense;
    	// they are just to demonstrate what you can do.
    	"reg" "4n 2n 2n 2n"
    	"other" "fillrectangle diamond isostriangle dblwhole"

    score
    	// Set notesheads, using an arbitrary mixture of builtin
    	// and user-defined head shapes.
    	noteheads="norm reg other reg reg other righttri"

    music

    1: c;d;2e;
    bar

    1: 2g;f;
    bar

    1: {b;a;g;}3;2c+;
    bar

    1: 1d;
    bar

    // do some shape overrides, both on group and note
    1: [ hs "pie" ]2ce; [hs "isostri"] c e g hs "righttri";
    endbar

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