LilyPond Beginnershandleiding

Hoofdstuk 4: Tweaking output 126
4.5.3 Real music example
We end this section on Tweaks by showing the steps to be taken to deal with a tricky example
which needs several tweaks to produce the desired output. The example has been deliberately
chosen to illustrate the use of the Notation Reference to resolve unusual problems with notation.
It is not representative of the more usual engraving process, so please do not let these difficulties
put you off! Fortunately, difficulties like these are not very common!
The example is from Chopin’s Première Ballade, Op. 23, bars 6 to 9, the transition from the
opening Lento to Moderato. Here, first, is what we want the output to look like, but to avoid
over-complicating the example too much we have left out the dynamics, fingering and pedalling.
4 6
4 6
Moderato
We note first that the right hand part in the third bar requires four voices. These are the five
beamed eighth notes, the tied C, the half-note D which is merged with the eighth note D, and
the dotted quarter note F-sharp, which is also merged with the eighth note at the same pitch.
Everything else is in a single voice, so the easiest way is to introduce these extra three voices
temporarily at the time they are needed. If you have forgotten how to do this, look at Sectie 3.2.1
[I’m hearing Voices], pagina 49 and Sectie 3.2.2 [Explicitly instantiating voices], pagina 53. Here
we choose to use explicitly instantiated voices for the polyphonic passage, as LilyPond is better
able to avoid collisions if all voices are instantiated explicitly in this way.
So let us begin by entering the notes as two variables, setting up the staff structure in a score
block, and seeing what LilyPond produces by default:
rhMusic = \relative c'' {
\new Voice {
r2 c4. g8 |
bes1~ |
\time 6/4
bes2. r8
% Start polyphonic section of four voices
> |