--- /dev/null
+/* XPM */
+static char *noname[] = {
+/* width height ncolors chars_per_pixel */
+"50 71 63 2",
+/* colors */
+"`` c #666664",
+"`a c #F2F2F4",
+"`b c #5E5E5C",
+"`c c #EAEAEC",
+"`d c #565654",
+"`e c #E2E2E4",
+"`f c #4E4E4C",
+"`g c #DADADC",
+"`h c #464644",
+"`i c #D2D2D4",
+"`j c #3E3E3C",
+"`k c #CACACC",
+"`l c #363634",
+"`m c #C2C2C4",
+"`n c #2E2E2C",
+"`o c #BABABC",
+"`p c #262624",
+"`q c #B2B2B4",
+"`r c #1E1E1C",
+"`s c #AAAAAC",
+"`t c #161614",
+"`u c #A2A2A4",
+"`v c #0E0E0C",
+"`w c #9A9A9C",
+"`x c #060604",
+"`y c #929294",
+"`z c #8A8A8C",
+"a` c #828284",
+"aa c #7A7A7C",
+"ab c #727274",
+"ac c #6A6A6C",
+"ad c #626264",
+"ae c #5A5A5C",
+"af c #525254",
+"ag c #4A4A4C",
+"ah c #424244",
+"ai c #3A3A3C",
+"aj c #323234",
+"ak c #2A2A2C",
+"al c #FEFEFC",
+"am c #222224",
+"an c #F6F6F4",
+"ao c #1A1A1C",
+"ap c #EEEEEC",
+"aq c #121214",
+"ar c #E6E6E4",
+"as c #0A0A0C",
+"at c #DEDEDC",
+"au c #D6D6D4",
+"av c #CECECC",
+"aw c #C6C6C4",
+"ax c #BEBEBC",
+"ay c #B6B6B4",
+"az c #AEAEAC",
+"b` c #A6A6A4",
+"ba c #9E9E9C",
+"bb c #969694",
+"bc c #8E8E8C",
+"bd c #868684",
+"be c #7E7E7C",
+"bf c #767674",
+"bg c #6E6E6C",
+"bh c #FAFAFC",
+/* pixels */
+"alalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalal",
+"alalbhbhalalbhalalbhalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalalal",
+"alalalbhbhalalbhalalalalalalalalalalalalalalalalalal`o`ya``s`wbhalalalalalalalalalalalalalalalalalal",
+"bhalalalalalbhalalalalalalalalalalalalalalalalalal`a`malalalap`obb`malalalalal`cax`galalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalalalalalalbcalbhalalalalalax`ialalal`gauav`u`ealalalalalalal",
+"alalalalalalalbhalalalalalalalalalalalalalalalalawar`ialalalalalalalaxapalalbaacat`i`oalalalalalalal",
+"alalbhalalalalbhalalalalalalalalalalalalalalalalazal`sbhalalalalalalalayalbh`eba`iapavalalalalalalal",
+"albhalbhalalalalalalalalalalalalalalalalalalalal`oatalb``aalalalalalal`oanazazanbhayalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalalalanawal`salalbaalalalalalalalazaa`cav`oalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalalapawalalaranal`i`qalalalalalalbeayazbcbcalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalal`g`oapalalalalal`yalalalalal`gbbabbhapalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalalal`sanalalalalalbdalalalalalbc`obbalalalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalalapaaanalalalalal`qatan`ealax`sbbazalalalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalal`kab`oalalalalalau`uaw`salbb`ua`bcalalalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalalalayalalalalalalan`ea`axax`oba`oazaxaralalalalalalalalalalal",
+"alalalalalalalalalalapbhalalalalalalalalalaybhalalalalan`s`sazav`gaz`qbdalalazalalalalalalalalalalal",
+"alalalalalalalalalalax`u`aalalalalalalalalaraw`o`c`c`aaxaw`g`kav`sayb`ayalal`m`calalalalalalalalalal",
+"alalalalalalalalalalal`c`sbhalalalalalalalalalal`c`jb`albh`yavapazay`w`ialalalay`aalalalalalalalalal",
+"alalalalalalalalalalalalar`qbhalalalalalalalalalal`v`sav`abcaubbaw`u`salalalalalayapalalalalalalalal",
+"alalalalalalalalalalalalal`i`kalalalalalalalalalal`l`way`uau`cazazazbc`q`ialalalal`galalalalalalalal",
+"alalalalalalalalalalalalalalaw`galalalalalalan`i`m`hbe`q`oap`w`m`uax`ialax`salalalalalalalalalalalal",
+"alalalalalalalalalalalalalalal`oatalalalbh`kbaadagad```oav`i`mb`ba`ualalal`i`oalalalalalalalalalalal",
+"alalalalalalalalalalalalalalalanaz`aalanaz`nag`ian`w`k`iar`waw`o`o`ialalalalau`ialalalalalalalalalal",
+"alalalalalalalalalalalalalalalalapba`c`zakac`aalau`calapaz`gbabb`qbhalalalalal`ualalalalalalalalalal",
+"alalalalalalalalalalalalalalalalal`ibdambd`c`aalalalal`a`yax`kb``u`aalalalalal`e`kalalalalalalalalal",
+"alalalalalalalalalalalalalalalalarbcajbf`q`kalalalalal`w`c`sbc`k`e`kalalalalalal`salalalalalalalalal",
+"alalalalalalalalalalalalalalalalawaoaibbaw`kalalalalapbaaw`gb`baalaualalalalalal`salalalalalalalalal",
+"alalalalalalalalalalalalalalal`cbgaq`y`q`o`ialalalal`wbh`sba`g`oalaralalalalalal`ualalalalalalalalal",
+"alalalalalalalbhbhalalalalalalar`v`lbfazap`qapalal`gaz`k`e`y`u`galbhalalalalalalb`alalalalalalalalal",
+"alalalalalalalalalalalalalalalbb`x`l`qayalap`u`aala`al`u`q`ebebhalbhalalalalalalb`alalalalalalalalal",
+"alalalalalalalalalalalalalalal`gao`hayazalalapb``kax`iaubeaybaalalalalalalalalalbaalalalalalalalalal",
+"alalalalalalalalalalalalalalalalbdahba`galalalatbcalbb`maxbeatalalalalalalalalalbaalalalalalalalalal",
+"alalalalalalalalalalalalalalalalau`jb``calbhalal`k`oaw`zapbfalalalalanalalalalal`salalalalalalalalal",
+"alalalalalalalalalalalalalalalal`aad`malalbbalalal`o`kbb`y`ialalalal`walalalalal`qalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalbebaalapbfalalalbhbb`c`dalalalalalagalalalalap`oalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalbb`ialalajalalalalap`w`walalalalaxaaalalalal`qalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalazalalalbf`aalalalalbaayanalalalbg`ealalalbh`qalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalaxalalalbebhalalal`c`s`saxalalal``alalalalaybhalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalal`oalalal`ealalalalbb`eaw`uawalalawalbhalataualalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalanalalalalalalalal`wb`alayb``malalal`sal`oalalalalalalalalalalalal",
+"alalalalalalalalalalalalalalalalalalalal`galalalal`q`g`wauaraz`yalalaxapalbhalalalalalalalalalalalal",
+"alalalalbhalalalalbhalalalalbhbhalalbhal`salalalal`waw`kay`kapb`al`k`galalalbhbhbhbhbhalalalalalalal",
+"albhbhalbhalalalalbhalalalalalbhalalal`i`malalbhar`sbdal`q`oalalal`walalbhalalalalalbhalalalalalalal",
+"bhalalalalalalalalalalalbhalalal`ialalanavalalalbcalbbat`g`qalbhar`qalalalalalalalalalbhbhbhbhbhbhal",
+"alalalalbhbhbhalalbhbhalalalal`mbealbhalawalalalbd`iat`oaratalal`yalbhalalalalalalalalalalalalalbhal",
+"alalbhalalalalbhalalalalbhbhal`najalal`aarbhal`s`eazalazazalal`cb`alalalbhbhbhbhbhalalalalalalalalal",
+"bhalbhalalalalbhalalalalalalbbas`naralalalalal`yalazarauayalalbaa`albhalalalalalbhalalalalalalalbhal",
+"alalalalalalalalalalbhalal`aaq`r`hbdalalalalaraz`m`aazan`mal`ebd`jalalalalalalalalbhbhbhbhbhbhalalal",
+"alalbhbhbhalalbhbhalalalalaa`vah`d`d`calbhalbaal`qal`o`obhalbhbd`ray`i`gbhalalalalalalalalalbhalbhal",
+"bhalalalalbhalalalalbhalal`v`t`lah```ualalalbaan`q`cavaxalalatbeai`hauaw`waz`kav`ialalalalalalalalal",
+"bhalalalalbhalalalalal`aap`x`tahafbb`ybdalavat`sbh`sal`qalal`c`qafam`faab`axauav`i`s`oaualalbhalbhal",
+"alalalalalalalanaxax`s`q`gasao`pbebabb`ubd`walb`al`oavapalalbhaybeagaq`n`sauaw`i`iapat`kayauapalalal",
+"bhbhbhalalav`kazarauayay`sad`r`facae`mazaubgb``sbh`m`oalalalalavbbaeai`j`oav`g`oatau`c`g`a`eb`azanal",
+"alalalat`o`e`mavayavauarawayaq`lbf`yb``e`zap`yawbd`qayalalalap`ibcad`j`jbb`i`gapal`cal`iatau`gar`o`c",
+"alal`eavalbh`g`g`g`ialanaral`b`vabbd`u`ibd`e`ual`o`ea`bbbdbcb`arb````la``uap`i`cavapalarav`catav`c`q",
+"al`eavar`aanar`gavatayavaranatasae`wbcawax`iaval`calalalalalalaybcaf`hbb`garan`g`c`g`i`eatauatau`oap",
+"al`s`a`carau`capanal`gapanbhal`s`ragbc`e`k`walalalalalalal`cap`oa`bfbgarauauan`g`i`e`c`c`a`g`cauatal",
+"al`e`qay`s`i`eanarau`matau`cauau`s`ta`bd`sawalbhalalbhalapatav`s`f`baxalanat`aananan`eawat`max`aalal",
+"bhalbhawavbh`aavar`e`gawawau`k`i`c`i`h`d`y`ealalbhalalalalapauaxb`avan`carbhan`gau`aan`iax`ebhalalal",
+"alalalalan`uawawal`g`e`e`oatavat`q`ganbb`babbhalalap`ubbb`bb`z`u`gaparbhbhalanaw`iavax`cbhalalalbhal",
+"albhalbhalalbhanax`oaw`m`i`m`m`kbhalalalap`obaavalbhan`aan`aalalalalapaxawaw`oapanbhalalalalalalbhal",
+"alalalalalalalalalalananbhanbhalalalalalalalan`gb``qawavaxau`m`o`o`s`eananalalalalalalalalalalalalal",
+"alalalalalalbhbhbhalalalalalalalalbhalbhalalalalalalbhbhanbhalalalalalalalalalalalalalalalbhalalalal",
+"albhalalalbhalalalalalalalalbhbhbhalalalbhalbhalalalalalalalbhalalalalalalalalalbhalalalbhalalalbhal",
+"alalbhbhalalalalalbhalbhalalalalalalalalbhalalbhalalalalbhalalalbhalalbhbhbhalalbhbhbhalalbhalalbhal",
+"albhalalalalalalbhalbhalbhalalalalbhalalalalbhalalalalalalalalbhalbhalalalalbhalalal`aalalalbhalalal",
+"alalalalbhbhbhalalalalalalalalbhalbhalalalalalbhbhbhbhalalbhalalalbhalalalalalap`qbb`salalalalalbhal",
+"alalalbhalalalalalalalalbhbhbhalalalbhalbhalalalalalalalbhalalalalalalalalalalae`uav`calalalbhalalal",
+"bhbhalalalalalbhalbhalalalalalalalalbhalalbhalalalalbhalalalbhalalbhbhbhalalalalalaralalalalbhalbhal"
+};
--- /dev/null
+% Creator: mf-to-table.py version 0.7
+% Automatically generated on
+% Do not edit
+% input from out/feta20.log
+% name
+% rests
+\fetdef\wholerest{0}
+\fetdef\halfrest{1}
+\fetdef\outsidewholerest{2}
+\fetdef\outsidehalfrest{3}
+\fetdef\breverest{4}
+\fetdef\longarest{5}
+\fetdef\multirest{6}
+\fetdef\quartrest{7}
+\fetdef\eighthrest{8}
+\fetdef\sixteenthrest{9}
+\fetdef\thirtysecondrest{10}
+\fetdef\sixtyfourthrest{11}
+\fetdef\hundredtwentyeighthrest{12}
+
+% accidentals
+\fetdef\sharp{13}
+\fetdef\natural{14}
+\fetdef\flat{15}
+\fetdef\flatflat{16}
+\fetdef\sharpsharp{17}
+\fetdef\rightparen{18}
+\fetdef\leftparen{19}
+
+% dots
+\fetdef\dot{20}
+\fetdef\repeatcolon{21}
+
+% balls
+\fetdef\brevisball{22}
+\fetdef\brevisledger{23}
+\fetdef\longaball{24}
+\fetdef\longaledger{25}
+\fetdef\wholeball{26}
+\fetdef\wholeledger{27}
+\fetdef\halfball{28}
+\fetdef\halfledger{29}
+\fetdef\quartball{30}
+\fetdef\quartledger{31}
+
+% scripts
+\fetdef\ufermata{32}
+\fetdef\dfermata{33}
+\fetdef\thumb{34}
+\fetdef\sforzatoaccent{35}
+\fetdef\staccato{36}
+\fetdef\ustaccatissimo{37}
+\fetdef\dstaccatissimo{38}
+\fetdef\tenuto{39}
+\fetdef\umarcato{40}
+\fetdef\dmarcato{41}
+\fetdef\ouvert{42}
+\fetdef\plusstop{43}
+\fetdef\upbow{44}
+\fetdef\downbow{45}
+\fetdef\reverseturn{46}
+\fetdef\turn{47}
+\fetdef\trill{48}
+\fetdef\upedalheel{49}
+\fetdef\dpedalheel{50}
+\fetdef\upedaltoe{51}
+\fetdef\dpedaltoe{52}
+\fetdef\flageolet{53}
+\fetdef\trilelement{54}
+\fetdef\prall{55}
+\fetdef\mordent{56}
+\fetdef\prallprall{57}
+\fetdef\prallmordent{58}
+\fetdef\upprall{59}
+\fetdef\downprall{60}
+\fetdef\accDiscant{61}
+\fetdef\accDiscantF{62}
+\fetdef\accDiscantEh{63}
+\fetdef\accDiscantE{64}
+\fetdef\accDiscantFE{65}
+\fetdef\accDiscantFEh{66}
+\fetdef\accDiscantEE{67}
+\fetdef\accDiscantFEE{68}
+\fetdef\accDiscantEEE{69}
+\fetdef\accDiscantFEEE{70}
+\fetdef\accDiscantS{71}
+\fetdef\accDiscantFS{72}
+\fetdef\accDiscantES{73}
+\fetdef\accDiscantEhS{74}
+\fetdef\accDiscantFES{75}
+\fetdef\accDiscantFEhS{76}
+\fetdef\accDiscantEES{77}
+\fetdef\accDiscantFEES{78}
+\fetdef\accDiscantEEES{79}
+\fetdef\accDiscantFEEES{80}
+\fetdef\accDiscantSS{81}
+\fetdef\accDiscantESS{82}
+\fetdef\accDiscantEESS{83}
+\fetdef\accDiscantEEESS{84}
+\fetdef\accFreebass{85}
+\fetdef\accFreebassF{86}
+\fetdef\accFreebassE{87}
+\fetdef\accFreebassFE{88}
+\fetdef\accStdbass{89}
+\fetdef\accStdbassM{90}
+\fetdef\accStdbassBp{91}
+\fetdef\accStdbassT{92}
+\fetdef\accStdbassTp{93}
+\fetdef\accBayanbass{94}
+\fetdef\accBayanbassT{95}
+\fetdef\accBayanbassE{96}
+\fetdef\accBayanbassTE{97}
+\fetdef\accBayanbassEE{98}
+\fetdef\accBayanbassTEE{99}
+\fetdef\accSB{100}
+\fetdef\accBB{101}
+\fetdef\accOldEE{102}
+\fetdef\accOldEES{103}
+
+% flags
+\fetdef\eighthflag{104}
+\fetdef\sixteenthflag{105}
+\fetdef\thirtysecondflag{106}
+\fetdef\sixtyfourthflag{107}
+\fetdef\deighthflag{108}
+\fetdef\dsixteenthflag{109}
+\fetdef\dthirtysecondflag{110}
+\fetdef\dsixtyfourthflag{111}
+
+% clefs
+\fetdef\altoclef{112}
+\fetdef\caltoclef{113}
+\fetdef\bassclef{114}
+\fetdef\cbassclef{115}
+\fetdef\trebleclef{116}
+\fetdef\ctrebleclef{117}
+
+% timesig
+\fetdef\fourfourmeter{118}
+\fetdef\allabreve{119}
+\fetdef\oldfourfourmeter{120}
+\fetdef\oldallabreve{121}
+\fetdef\oldthreetwometer{122}
+\fetdef\oldsixfourmeter{123}
+\fetdef\oldninefourmeter{124}
+
--- /dev/null
+
+ % -*-LaTeX-*-
+
+\documentclass{article}
+\def\kdots{,\ldots,}
+\title{Not the Font-En-Tja font}
+\author{HWN \& JCN}
+\def\preMudelaExample{}
+\def\postMudelaExample{}
+\begin{document}
+\maketitle
+
+
+\section{Introduction}
+
+This document are some design notes of the Feta font, and other
+symbols related to LilyPond. Feta (not an abbreviation of
+Font-En-Tja) is a font of music symbols. All MetaFont sources are
+original. The symbols are modelled after various editions of music,
+notably \begin{itemize} \item B\"arenreiter \item Hofmeister \item
+Breitkopf \item Durand \& C'ie \end{itemize}
+
+The best references on Music engraving are Wanske\cite{wanske} and
+Ross\cite{ross} some of their insights were used. Although it is a
+matter of taste, I'd say that B\"arenreiter has the finest typography
+of all.
+
+
+\section{Bezier curves for slurs}
+
+Objective: slurs in music are curved objects designating that notes
+should fluently bound. They are drawn as smooth curves, with their
+center thicker and the endings tapered.
+
+There are some variants: the simplest slur shape only has the width as
+parameter. Then we give some suggestions for tuning the shapes. The
+simple slur algorithm is used for drawing ties as well.
+
+
+
+\subsection{Simple slurs}
+
+Long slurs are flat, whereas short slurs look like small circle arcs.
+Details are given in Wanske\cite{ross} and Ross\cite{wanske}. The
+shape of a slur can be given as a Bezier curve with four control
+points:
+
+\begin{eqnarray*}
+ B(t) &=& (1-t)^3c_1 +3(1-t)^2tc_2 + 3(1-t)t^2c_3 + t^3c_4.
+\end{eqnarray*}
+
+We will assume that the slur connects two notes of the same
+pitch. Different slurs can be created by rotating the derived shape.
+We will also assume that the slur has a vertical axis of symmetry
+through its center. The left point will be the origin. So we have
+the following equations for the control points $c_1\kdots c_4$.
+
+\begin{eqnarray*}
+c_1&=& (0,0)\\
+c_2&=& (i, h)\\
+c_3&=& (b-i, h)\\
+c_4&=& (b, 0)
+\end{eqnarray*}
+
+The quantity $b$ is given, it is the width of the slur. The
+conditions on the shape of the slur for small and large $b$ transform
+to
+\begin{eqnarray*}
+ h \to h_{\infty} , &&\quad b \to \infty\\
+ h \approx r_{0} b, &&\quad b \to 0.
+\end{eqnarray*}
+To tackle this, we will assume that $h = F(b)$, for some kind of
+$F(\cdot)$. One function that satisfies the above conditions is
+$$
+F(b) = h_{\infty} \frac{2}{\pi} \arctan \left( \frac{\pi r_0}{2
+h_{\infty}} b \right).
+$$
+
+For satisfying results we choose $h_{\infty} = 2\cdot \texttt{interline}$
+and $r_0 = \frac 13$.
+
+\subsection{Height correction}
+
+Aside from being a smooth curve, slurs should avoid crossing
+enclosed notes and their stems.
+
+An easy way to achieve this is to extend the slur's height,
+so that the slur will curve just above any disturbing notes.
+
+The parameter $i$ determines the flatness of the curve. Satisfying
+results have been obtained with $i = h$.
+
+The formula can be generalised to allow for corrections in the shape,
+\begin{eqnarray*}
+c_1&=& (0,0)\\
+c_2&=& (i', h')\\
+c_3&=& (b-i', h')\\
+c_4&=& (b, 0)
+\end{eqnarray*}
+Where
+$$
+i' = h(b) (1 + i_{corr}), \quad h' = h(b) (1 + h_{corr}).
+$$
+
+The default values for these corrections are $0$. A $h_{corr}$ that is
+negative, makes the curve flatter in the center. A $h_{corr}$ that is
+positive make the curve higher.
+
+At every encompassed note's x position the difference $\delta _y$
+between the slur's height and the note is calculated. The greatest
+$\delta _y$ is used to calculate $h_{corr}$ is by lineair extrapolation.
+
+However, this simple method produces satisfactory results only for
+small and symmetric disturbances.
+
+
+\subsection{Tangent method correction}
+
+A somewhat more elaborate\footnote{While staying in the realm
+of empiric computer science} way of having a slur avoid
+disturbing notes is by first defining the slur's ideal shape
+and then using the height correction. The ideal shape of a
+slur can be guessed by calculating the tangents of the disturbing
+notes:
+% a picture wouldn't hurt...
+\begin{eqnarray*}
+ y_{disturb,l} &=& \rm{rc}_l x\\
+ y_{disturb,r} &=& \rm{rc}_r + c_{3,x},
+\end{eqnarray*}
+where
+\begin{eqnarray*}
+ \rm{rc}_l &=& \frac{y_{disturb,l} - y_{encompass,1}}
+ {x_{disturb,l} - x_{encompass,1}}\dot x\\
+ \rm{rc}_r &=& \frac{y_{encompass,n} - y_{disturb,r}}
+ {x_{encompass,n} - x_{disturb,r}} \dot x + c_{3,x}.
+\end{eqnarray*}
+
+We assume that having the control points $c_2$ and $c_3$ located
+on tangent$_1$ and tangent$_2$ resp.
+% t: tangent
+\begin{eqnarray*}
+ y_{tangent,l} &=& \alpha \rm{rc}_l x\\
+ y_{tangent,r} &=& \alpha \rm{rc}_r + c_{3,x}.
+\end{eqnarray*}
+
+Beautiful slurs have rather strong curvature at the extreme
+control points. That's why we'll have $\alpha > 1$.
+Satisfactory resulsts have been obtained with
+$$
+ \alpha \approx 2.4.
+$$
+
+The positions of control points $c_2$ and $c_3$ are obtained
+by solving with the height-line
+\begin{eqnarray*}
+ y_h &=& \rm{rc}_h + c_h.
+\end{eqnarray*}
+
+The top-line runs through the points disturb$_{left}$ and
+disturb$_{right}$. In the case that
+$$
+z_{disturb,l} = z_{disturb,r},
+$$
+we'll have
+$$
+ \angle(y_{tangent,l},y_h) = \angle(y_{tangent,r},y_h).
+$$
+
+
+
+\section{Sizes}
+
+Traditional engraving uses a set of 9 standardised sizes for Staffs
+(running from 0 to 8).
+
+We have tried to measure these (helped by a magnifying glass), and
+found the staffsizes in table~\ref{fonts:staff-size}. One should note that
+these are estimates, so I think there could be a measuring error of ~
+.5 pt. Moreover [Ross] states that not all engravers use exactly
+those sizes.
+
+\begin{table}[h]
+ \begin{center}
+ \begin{tabular}{lll}
+Staffsize &Numbers &Name\\
+\hline\\
+26.2pt &No. 0\\
+22.6pt &No. 1 &Giant/English\\
+21.3pt &No. 2 &Giant/English\\
+19.9pt &No. 3 &Regular, Ordinary, Common\\
+19.1pt &No. 4 &Peter\\
+17.1pt &No. 5 &Large middle\\
+15.9pt &No. 6 &Small middle\\
+13.7pt &No. 7 &Cadenza\\
+11.1pt &No. 8 &Pearl\\
+ \end{tabular}
+ \caption{Foo}
+ \label{fonts:staff-size}
+ \end{center}
+\end{table}
+
+
+
+
+\section{Beams}
+
+\subsection{Slope}
+
+Traditionally, beam slopes are computed by following a large and hairy
+set of rules. Some of these are talked-about in Wanske, a more
+recipy-like description can be found in Ross.
+
+There are some problems when trying to follow these rules:
+\begin{itemize}
+
+\item the set is not complete
+
+\item they are not formulated as a general rule with exceptions, but
+rather as a huge case of individual rules\cite{ross}
+
+\item in some cases, the result is wrong or ugly (or both)
+
+\item they try to solve a couple of problems at a time (e.g. Ross
+handles ideal slope and slope-quantisation as a paired problem)
+\end{itemize}
+Reading Ross it is clear that the rules presented there are certainly
+not the ultimate idea of what beam(slope)s should look like, but
+rather a (very much) simplified hands-on recipy for a human engraver.
+
+There are good reasons not to follow those rules:
+
+\begin{itemize}
+\item One cannot expect a human engraver to solve least-squares
+problems for every beam
+
+\item A human engravers will allways trust themselves in judging the
+outcome of the applied recipy. If, in a complicated case, the result
+"doesn't look good", they will ignore the rules and draw their own
+beams, based on experience.
+
+\item The exact rules probably don't "really exist" but in the minds
+ of good engravers, in the form of experience
+\end{itemize}
+
+We'll propose to do a least-squares solve. This seems to be the best
+way to calculate the slope for a computerised engraver such as Lily.
+
+It would be nice to have some rules to catch and handle "ugly" cases,
+though. In general, the slope of the beam should mirror the pitches
+of the notes. If this can't be done because there simply is no
+uniform trend, it would probably be best to set the slope to zero.
+
+
+\subsection{Quantising}
+
+The beams should be prevented to conflict with the stafflines,
+especially at small slopes. Traditionally, poor printing techniques
+imposed rather strict rules for quantisation. In modern (post 1955)
+music printing we see that quality has improved substantially and
+obsoleted the technical justification for following some of these
+strict rules, notably the avoiding of so-called wedges.
+
+
+\subsection{Thickness and spacing}
+
+The spacing of double and triple beams (sixteenth and thirtysecond beams)
+is the same, quadruple and quintuple (thirtyfourth and hundredtwentyeighth
+beams) is wider.
+All beams are equally thick. Using the layout of triple beams and the
+beam-thickness $bt$ we can calculate the inter-beam spacing $ib$.
+
+Three beams span two interlines, including stafflines:
+\begin{eqnarray*}
+ 2 ib + bt &=& 2 il\\
+ ib &=& (2 il - bt) / 2
+\end{eqnarray*}
+
+We choose
+\begin{eqnarray*}
+ bt &=& 0.48(il - st)
+\end{eqnarray*}
+
+\subsubsection{Quadruple beams}
+
+If we have more than three beams they must open-up
+in order to not collide with staff lines. The only valid
+position that remains is for the upper beam to hang.
+
+\begin{eqnarray*}
+ 3 ib_{4+} + bt &=& 3 il\\
+ ib_{4+} &=& (3 il - bt) / 3
+\end{eqnarray*}
+
+
+\section{Layout of the source files}
+
+The main font (with the fixed size music glyphs) uses a the \TeX\
+logfile as a communication device. Use the specialised macros to
+create and export glyphs.
+
+\bibliographystyle{plain}
+\bibliography{engraving}
+
+
+
+\end{document}
+
+\begin{verbatim}
+Paul Terry <paul@musonix.demon.co.uk> writes:
+
+Ross states that the dies (the stamps to make the symbols) come in
+12 different sizes.
+
+>Can you tell me how big rastrals are?
+
+According to the Score manual:
+
+ Rastral Size Height in millimetres
+
+ 0 9 mm
+ 1 8 mm
+ 2 7.5 mm
+ 3 7 mm
+ 4 6.5 mm
+ 5 6 mm
+ 6 5.5 mm
+
+I must say, despite having been a music setter for many years, I had to
+look these up - none of the publishers I work for deal in Rastral sizes
+these days (they all use millimetres).
--- /dev/null
+
+\input lilyponddefs
+
+\def\fetdef#1#2{%
+ \def#1{\hbox{\char#2}}}
+
+% huh? from where
+\input feta20.sty
+
+\font\fetasixteenfont=feta16
+\font\fetaelevenfont=feta11
+\def\fetafont{\fetasixteenfont}
+
+\newdimen\ild
+\ild=4pt
+\newdimen\stemthick
+\stemthick=0.4pt
+
+\def\eighthstem{{\fetafont\vrule height 3.5ex width \stemthick depth0pt\raise
+ 3.5ex\hbox{\eighthflag}}}
+\def\texteighthflag{{\fetafont\raise 0ex\hbox{\fetafont\eighthflag}}}
+\def\textdeighthflag{{\fetafont\raise 0ex\hbox{\deighthflag}}}
+
+\def\texteighthnote{{\hbox{\hbox{\fetafont\quartball}\kern
+ -0.5\stemthick\eighthstem}}}
+\def\quarterstem{{\fetafont\vrule height 3.5ex width \stemthick depth0pt}}
+\def\textquarterstem{\quarterstem}
+\def\textchord{{\hbox{\fetafont\lower.5ex\hbox to
+ 0pt{\textquarterhead}\raise.5ex\hbox{\textquarterhead}\kern
+ -0.5\stemthick\eighthstem}}}
+\def\textbassclef{\hbox{\fetafont\bassclef}}
+\def\texttrebleclef{\hbox{\fetafont\trebleclef}}
+\def\textslur{\embeddedps{9.378744 -3.171539 3.923099 -3.171539 0.000000 0.000000 12.800000 0.000000 3.672177 -3.672177 9.127823 -3.672177 12.800000 0.000000 0.000000 0.000000 draw_slur}}
+
+\def\textmarcato{{\fetafont\raise 1ex\hbox{\hskip 1ex\sforzatoaccent}}}
+
+
+\def\textquarterhead{\hbox{\fetafont\raise 2.5pt\hbox{\quartball}}}
+\def\texteighthstem{\hbox{\lower 5pt\hbox{\eighthstem}}}
+\def\texthalfnote{{\hbox{\hbox{\fetafont\halfball}\kern -0.5\stemthick\quarterstem}}}
+\def\textquarternote{{\hbox{\hbox{\fetafont\quartball}\kern -0.5\stemthick\quarterstem}}}
+\def\textflat{{\fetafont\raise 1ex\hbox{\flat}}}
+\def\textsharp{{\fetafont\raise1ex\hbox{\sharp}}}
--- /dev/null
+\score{
+ \context PianoStaff <
+ \context Staff=one \notes\relative c'{
+ \stemup [c8 c \translator Staff=two \stemup c c]
+ [c c c c]
+ \translator Staff=one
+ \stemdown [c8 c \translator Staff=two \stemup c c]
+ r2
+ \stemdown [c8 c \translator Staff=one \stemdown c c]
+ r2
+ \translator Staff=two
+ \stemup [c8 c \translator Staff=one \stemdown c c]
+ r2
+ }
+ \context Staff=two \notes\relative c'{
+ \clef bass;
+ s1
+ s1
+ s1
+ s1
+ }
+ >
+ \paper{
+ \translator{
+ \PianoStaffContext
+ minVerticalAlign = 3.0*\staffheight;
+ maxVerticalAlign = 3.0*\staffheight;
+ }
+% linewidth=-1.;
+ }
+}
+
+\version "1.2.0";
--- /dev/null
+\score{
+ \context PianoStaff <
+ \context Staff=one \notes\relative c'{
+ \stemup c4( c \translator Staff=two c )c |
+ \translator Staff=one
+ \stemup c4( c \translator Staff=two c )c |
+ \stemup c4( c \translator Staff=one c )c |
+ \translator Staff=two
+ \stemup c4( c \translator Staff=one c )c |
+ \translator Staff=two
+ \stemup c4( \translator Staff=one c c )c |
+ r2
+ \translator Staff=two
+ \stemup c4( \translator Staff=one c
+ \break
+ c )c
+ r2
+% \stemdown c4( \translator Staff=two c c \translator Staff=one )c
+ \stemdown d4( \translator Staff=two c c \translator Staff=one )d
+ \translator Staff=two
+ \stemup c4( \translator Staff=one c c \translator Staff=two )c
+ r1
+ }
+ \context Staff=two \notes\relative c'{
+ \clef bass;
+ s1 s1 s1 s1 s1 s1 s1 s1 s1 s1
+ }
+ >
+ \paper{
+ \translator{
+ \PianoStaffContext
+ minVerticalAlign = 3.0*\staffheight;
+ maxVerticalAlign = 3.0*\staffheight;
+ }
+ %linewidth=100.\mm;
+ }
+}
+
+\version "1.2.0";
projects / lilypond.git / commitdiff