mpdolce - LilyPond

Chapter 4: Tweaking output 125
Simulating a fermata in MIDI
For outside-staff objects it is usually better to override the object’s stencil property rather
than its transparent property when you wish to remove it from the printed output. Setting the
stencil property of an object to #f will remove that object entirely from the printed output.
This means it has no effect on the placement of other objects placed relative to it.
For example, if we wished to change the metronome setting in order to simulate a fermata in
the MIDI output we would not want the metronome markings to appear in the printed output,
and we would not want it to influence the spacing between the two systems or the positions of
adjacent annotations on the staff. So setting its stencil property to #f would be the best way.
We show here the effect of the two methods:
\score {
\relative c'' {
% Visible tempo marking
\tempo 4=120
a4 a a
\once \override Score.MetronomeMark #'transparent = ##t
% Invisible tempo marking to lengthen fermata in MIDI
\tempo 4=80
a\fermata
% New tempo for next section
\tempo 4=100
a a a a
}
\layout { }
\midi { }
}
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\score {
\relative c'' {
% Visible tempo marking
\tempo 4=120
a4 a a
\once \override Score.MetronomeMark #'stencil = ##f
% Invisible tempo marking to lengthen fermata in MIDI
\tempo 4=80
a\fermata
% New tempo for next section
\tempo 4=100
a a a a
}
\layout { }
\midi { }
}
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