\begin{document}
\maketitle
-This document tries give an brief overview of LilyPond features. When
+This document tries give an brief overview of LilyPond features. When
the text correspond with the shown notation, we consider LilyPond
-Officially BugFree (tm).
+Officially BugFree (tm). This document is intended for finding bugs,
+and documenting bugfixes.
\section{Notes and rests}
\mudelafile{noteheadstyle.ly}
+Noteheads can have dots, and ---although this is bad style in duple
+meters--- rests can too. Augmentation dots should never be printed on
+a staff line, but rather be shifted: down stem notes shift dots down,
+up stem up. In case of chords, all dots should be in a column. The
+dots go along as rests are shifted to avoid collisions.
+
+\mudelafile{dots.fly}
+
Multiple measure rests do not collide with barlines and clefs. They
-are not expanded when you set Score.SkipBars
+are not expanded when you set \verb+Score.SkipBars+. Although the
+multi-measure-rest is a Spanner, minimum distances are set to keep it
+colliding from barlines.
\mudelafile{multi-measure-rest.ly}
the two systems for y dimensions (1 unit = staffspace, 1 unit = 1
point) are mixed.
-\section{Grace notes}
+Stems, beams, ties and slurs should behave similarly, when placed
+on the middle staff line. Of course stem-direction is down for high
+notes, and up for low notes.
-Grace notes are typeset as an encapsulated piece of music. You can
-have beams, notes, chords, stems etc. within a \verb|\grace|
-section. Slurs that start within a grace section, but aren't ended are
-attached to the next normal note. Grace notes have zero duration
+\mudelafile{stem-direction.sly}
+\section{Grace notes}
+Grace notes are typeset as an encapsulated piece of music. You can
+have beams, notes, chords, stems etc. within a \verb|\grace| section.
+Slurs that start within a grace section, but aren't ended are attached
+to the next normal note. Grace notes have zero duration. If there
+are tuplets, the grace notes won't be under the brace. Grace notes
+can have accidentals, but they are (currently) spaced at a fixed
+distance. Grace notes (of course) come before the accidentals of the
+main note. Grace notes can also be positioned after the main note.
\mudelafile{grace.ly}
%
% \mud elafile{beam-repeat.ly}
+Beams should behave reasonably well, even under extreme circumstances.
+Stems may be short, but noteheads should never touch the beam.
+
+\mudelafile{beam-extreme.ly}
+
+Beams should always reach the middle staff line, the second beam
+counting from the note head side, should never be lower than the
+second staff line. This does not hold for grace note beams.
+
+\mudelafile{beam-position.sly}
+
+Slurs should look nice and symmetric. The curvature may increase
+only to avoid noteheads, and as little as possible.
+
+\mudelafile{slur-symmetry.ly}
+\mudelafile{slur-symmetry-1.ly}
+
+Ties are strictly horizontal. They are placed in between note heads.
+The horizontal middle should not overlap with a staffline.
+
+\mudelafile{tie.ly}
+
Beams can be typeset over fixed distance aligned staffs, beam
beautification doesn't really work, but knees do. Beams should be
behave well, wherever the switching point is.
\mudelafile{repeat-unfold.ly}
Semi (un)folded behavior. Voltas can start on non-barline moments.
+If they don't barlines should still be shown.
\mudelafile{repeat-semifold.ly}
\mudelafile{repeat-fold.ly}
+\section{Lyrics}
+
+Lyrics can be set to a melody automatically. Excess lyrics will be
+dumped. Lyrics will not be set over rests. You can have melismata by
+setting a property melismaBusy. If you want a different order than
+first Music, then Lyrics, you must precook a chord of staffs/lyrics
+and label those. Of course \verb+\rhythm+ ignores any other rhythms
+in the piece. Hyphens and extenders do not assume anything about
+lyric lengths, so they continue to work.
+
+\mudelafile{lyric-combine.ly}
+
\section{Multiple notes}
Rests should not collide with beams, stems and noteheads. Rests may
\mudelafile{collisions.ly}
The number of stafflines of a staff can be set with the property
-numberOfStaffLines. Ledger lines both on note heads and rests are adjusted.
+numberOfStaffLines. Ledger lines both on note heads and rests are
+adjusted. Barlines also are adjusted.
+
\mudelafile{number-staff-lines.fly}
\mudelafile{stem-spacing.sly}
+Even if a line is very tightly spaced, there will still be room
+between prefatory matter and the following notes. The space after the
+prefatory is very rigid. In contrast, the space before the barline
+must stretch like the space within the measure.
+
+Tight:
+
+\mudelafile{spacing-tight.ly}
+
+Natural:
+
+\mudelafile{spacing-natural.ly}
+
+Loose:
+
+\mudelafile{spacing-loose.ly}
+
+
\section{Global stuff}
Markings that are attached to (invisible) barlines are
\mudelafile{bar-scripts.ly}
Staff margins are also markings attached to barlines. They should be
-left otf the staff, and be centered vertically wrt the staff. They
-may be on normal staffs, but also on compound staffs, like the
-PianoStaff
+left of the staff, and be centered vertically wrt the staff. They may
+be on normal staffs, but also on compound staffs, like the PianoStaff
\mudelafile{staff-margin.ly}
\mudelafile{breathing-sign.ly}
+Fonts are available in a default set of sizes: 11, 13, 16, 20, 23 and
+26pt staffheight. Sizes of the text fonts and symbol fonts are made
+to match the staff dimensions.
+
+\mudelafile{size11.ly}
+
+\mudelafile{size13.ly}
+
+\mudelafile{size16.ly}
+
+\mudelafile{size20.ly}
+
+\mudelafile{size23.ly}
+
+\mudelafile{size26.ly}
+
\section{Clefs and Time Signatures}
The transparent clef should not occupy any space and with style
\texttt{fullSizeChanges}, the changing clef should be typeset in full
size. For octaviated clefs, the ``8'' should appear closely above or
-below the clef respectively. The ``8'' is processed in a rather
-convoluted way, so this is fragile as well.
+below the clef respectively. The ``8'' is processed in a convoluted
+way, so this is fragile as well.
\mudelafile{clefs.ly}
+\def\bla#1{%the input file is too long and does not test for specific bugs
By default, time signatures are written with two numbers. With style
``C'', 4/4 and 2/2 are written with their corresponding symbols and
-with style ``old'', 2/2, 3/2, 3/4, 4/4, 6/4, 9/4, 6/8 and 9/8 are
-typeset with symbols, all other signatures retain the default layout.
-The style ``1'', gives single number signatures for all signatures.
-
-\mudelafile{time.fly}
-
+with style ``old'', 2/2, 3/2, 2/4, 3/4, 4/4, 6/4, 9/4, 4/8, 6/8 and
+9/8 are typeset with symbols, all other signatures retain the default
+layout. The style ``1'', gives single number signatures for all
+signatures.
+%
+\mu delafile{time.fly}
+}
\end{document}
projects / lilypond.git / blobdiff