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3.5.2 MIDI block
A \midi block must appear within a score block if MIDI output
is required. It is analogous to the layout block, but somewhat
simpler. Often, the \midi block is left empty, but it
can contain context rearrangements, new context definitions or code
to set the values of properties. For example, the following will
set the initial tempo exported to a MIDI file without causing a tempo
indication to be printed:
\score {
...music...
\midi {
\context {
\Score
tempoWholesPerMinute = #(ly:make-moment 72 4)
}
}
}
In this example the tempo is set to 72 quarter note beats per minute. This kind of tempo specification cannot take a dotted note length as an argument. If one is required, break the dotted note into smaller units. For example, a tempo of 90 dotted quarter notes per minute can be specified as 270 eighth notes per minute:
tempoWholesPerMinute = #(ly:make-moment 270 8)
Context definitions follow precisely the same syntax as those
within a \layout block. Translation modules for sound are
called performers. The contexts for MIDI output are defined in
‘../ly/performer-init.ly’,
see
Other sources of information.
For example, to remove the effect of dynamics
from the MIDI output, insert the following lines in the
\midi{ } block.
\midi {
...
\context {
\Voice
\remove "Dynamic_performer"
}
}
MIDI output is created only when a \midi block is included
within a score block defined with a \score command.
\score {
{ …notes… }
\midi { }
}
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