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Using the predefined accidental macros
The constructs for describing the accidental typesetting rules are
quite hairy, so non-experts should stick to the macros defined in
ly/property-init.ly .
The macros operate on the "Current" context (see Context properties). This
means that the macros shuold normally be invoked right after the
creation of the context in which the accidental typesetting described
by the macro is to take effect. I.e. if you want to use
piano-accidentals in a pianostaff then you issue
\pianoAccidentals first thing after the creation of the piano
staff:
\score {
\notes \relative c'' <
\context Staff = sa { cis4 d e2 }
\context GrandStaff <
\pianoAccidentals
\context Staff = sb { cis4 d e2 }
\context Staff = sc { es2 c }
>
\context Staff = sd { es2 c }
>
}
The macros are:
\defaultAccidentals
- This is the default typesetting behaviour. It should correspond
to 18th century common practice: Accidentals are
remembered to the end of the measure in which they occur and
only on their own octave.
\voiceAccidentals
- The normal behaviour is to remember the accidentals on
Staff-level.
This macro, however, typesets accidentals individually for each
voice.
Apart from that the rule is similar to
\defaultAccidentals .
Warning: This leads to some weird and often unwanted results
because accidentals from one voice DO NOT get cancelled in other
voices:
\context Staff <
\voiceAccidentals
\context Voice=va { \voiceOne es g }
\context Voice=vb { \voiceTwo c, e }
>
Hence you should only use \voiceAccidentals
if the voices are to be read solely by
individual musicians. if the staff should be readable also
by one musician/conductor then you should use
\modernVoiceAccidentals or \modernVoiceCautionaries
instead.
\modernAccidentals
- This rule should correspond to the common practice in the 20th
century.
The rule is a bit more complex than
\defaultAccidentals :
You get all the same accidentals, but temporary
accidentals also get cancelled in other octaves. Further more,
in the same octave, they also get cancelled in the following measure:
\modernAccidentals
cis' c'' cis'2 | c'' c'
\modernCautionaries
- This rule is similar to
\modernAccidentals , but the
"extra" accidentals (the ones not typeset by
\defaultAccidentals ) are typeset as cautionary accidentals
(i.e. in reduced size):
\modernCautionaries
cis' c'' cis'2 | c'' c'
\modernVoiceAccidentals
- Multivoice accidentals to be read both by musicians playing one voice
and musicians playing all voices.
Accidentals are typeset for each voice, but they ARE cancelled
across voices in the same Staff
.
\modernVoiceCautionaries
- The same as
\modernVoiceAccidentals , but with the
extra accidentals (the ones not typeset by
\voiceAccidentals ) typeset as cautionaries.
Notice that even though all accidentals typeset by
\defaultAccidentals ARE typeset by this macro then some
of them are typeset as cautionaries.
\pianoAccidentals
- 20th century practice for piano notation. Very similar to
\modernAccidentals but accidentals also get cancelled
across the staves in the same GrandStaff
or
PianoStaff
.
\pianoCautionaries
- As
\pianoAccidentals but with the extra accidentals
typeset as cautionaries.
\noResetKey
- Same as
\defaultAccidentals but with accidentals lasting
"forever" and not only until the next measure:
\noResetKey
c1 cis cis c
\forgetAccidentals
- This is sort of the opposite of
\noResetKey : Accidentals
are not remembered at all - and hence all accidentals are
typeset relative to the key signature, regardless of what was
before in the music:
\forgetAccidentals
\key d\major c4 c cis cis d d dis dis
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Copyright (c) 1997--2002 Han-Wen Nienhuys and Jan Nieuwenhuizen.
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