Hi Urs,
On Mon, Feb 3, 2014 at 3:16 AM, Urs Liska <[email protected]> wrote:
> Hi,
>
> searching the docs and the lilypond-user archive I couldn't find any
> relevant information.
>
> I am looking for a custom \accidentalStyle. Actually I think this is quite
> commonly used, so it would also seem like a useful addition to LilyPond
> proper.
>
> a)
> Every note gets an explicit accidental (including a natural),
> as in the 'dodecaphonic style,
> _except_ when a note is repeated immediately in the same voice.
>
I've seen it too, and I think it would be good to include it.
>
> When looking into music-functions.scm and its set-accidental-style I see
>
> ((equal? style 'dodecaphonic)
> (set-accidentals-properties #f
> `(Staff ,(lambda (c p bn mp) '(#f . #t)))
> '()
> context))
>
>
> So it seems the way to go to make a copy of that definition (e.g. with
> comparing against 'dodecaphonic-no-repeat) and modifying the definition.
>
Yes. That's what I do in the attached file.
>
> Unfortunately I don't have a clue how to proceed. Any trials are simply
> anwered by errors, so I'd prefer not to _try_ but to do at least _informed
> guesses_ ;-)
>
> I assume that the
> `(Staff
> expression returns the
> context pitch barnumber measureposition
> arguments for
> set-accidental-properties
> so this seems the place to define the right arguments.
>
> Unfortunately I haven't _fully_ understood lambda expressions and _barely_
> understood quoting and unquoting.
>
> So I'd be glad about hints/explanations/solutions to
>
> a)
> create a differing but valid argument list at all and
> b)
> determining which '(#f . #t) combinations to use for my purpose.
>
>
I confess that I find what goes on in the source a bit confusing, but I did
come up with something that appears to work. I make no claims about having
done this the right way :)
First of all, I looked at clauses other than that for dodecaphonic for
inspiration, since that one is only good for hit-it-with-a-hammer
situations, and you need some refinement here. You definitely want the
initial #f which prevents old-style cancellations--the extra natural when
flat follows double-flat, but you need some variability in your setting of
the cdr--that is, auto-accidentals.
I used neo-modern as a starting point, and wrote a
'dodecaphonic-no-repeat-rule'.
I had to copy other functions from scm/music-functions.scm since they're
not define-public.
The file includes the demonstration example from the NR.
--David
\version "2.18.0"
%% LOCAL FUNCTIONS FROM scm/music-functions.scm
#(define (key-entry-notename entry)
"Return the pitch of an @var{entry} in @code{localKeySignature}.
The @samp{car} of the entry is either of the form @code{notename} or
of the form @code{(octave . notename)}. The latter form is used for special
key signatures or to indicate an explicit accidental.
The @samp{cdr} of the entry is either a rational @code{alter} indicating
a key signature alteration, or of the form
@code{(alter . (barnum . measurepos))} indicating an alteration caused by
an accidental in music."
(if (pair? (car entry))
(cdar entry)
(car entry)))
#(define (key-entry-octave entry)
"Return the octave of an entry in @code{localKeySignature}
or @code{#f} if the entry does not have an octave.
See @code{key-entry-notename} for details."
(and (pair? (car entry)) (caar entry)))
#(define (key-entry-bar-number entry)
"Return the bar number of an entry in @code{localKeySignature}
or @code {#f} if the entry does not have a bar number.
See @code{key-entry-notename} for details."
(and (pair? (cdr entry)) (caddr entry)))
#(define (key-entry-measure-position entry)
"Return the measure position of an entry in @code{localKeySignature}
or @code {#f} if the entry does not have a measure position.
See @code{key-entry-notename} for details."
(and (pair? (cdr entry)) (cdddr entry)))
%%%%%%%%%%%%%%% END COPIED STUFF %%%%%%%%%%%%%%%%
%% BASED on 'neo-modern-accidental-rule' %%
#(define-public (dodecaphonic-no-repeat-rule context pitch barnum measurepos)
(let* ((keysig (ly:context-property context 'localKeySignature))
(entry (find-pitch-entry keysig pitch #t #t)))
(if (not entry)
(cons #f #t)
(let* ((entrymp (key-entry-measure-position entry))
(entrybn (key-entry-bar-number entry)))
(cons #f
(not
(and (equal? entrybn barnum) (equal? entrymp measurepos))))))))
%% FROM scm/music-functions.scm with another style added %%
#(define-public (set-accidental-style style . rest)
"Set accidental style to @var{style}. Optionally take a context
argument, e.g. @code{'Staff} or @code{'Voice}. The context defaults
to @code{Staff}, except for piano styles, which use @code{GrandStaff}
as a context."
(let ((context (if (pair? rest)
(car rest) 'Staff))
(pcontext (if (pair? rest)
(car rest) 'GrandStaff)))
(cond
;; accidentals as they were common in the 18th century.
((equal? style 'default)
(set-accidentals-properties #t
`(Staff ,(make-accidental-rule 'same-octave 0))
'()
context))
;; accidentals from one voice do NOT get canceled in other voices
((equal? style 'voice)
(set-accidentals-properties #t
`(Voice ,(make-accidental-rule 'same-octave 0))
'()
context))
;; accidentals as suggested by Kurt Stone, Music Notation in the 20th century.
;; This includes all the default accidentals, but accidentals also needs canceling
;; in other octaves and in the next measure.
((equal? style 'modern)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
'()
context))
;; the accidentals that Stone adds to the old standard as cautionaries
((equal? style 'modern-cautionary)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0))
`(Staff ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
context))
;; same as modern, but accidentals different from the key signature are always
;; typeset - unless they directly follow a note of the same pitch.
((equal? style 'neo-modern)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule)
'()
context))
((equal? style 'neo-modern-cautionary)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0))
`(Staff ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule)
context))
((equal? style 'neo-modern-voice)
(set-accidentals-properties #f
`(Voice ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule
Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule)
'()
context))
((equal? style 'neo-modern-voice-cautionary)
(set-accidentals-properties #f
`(Voice ,(make-accidental-rule 'same-octave 0))
`(Voice ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule
Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
,neo-modern-accidental-rule)
context))
;; Accidentals as they were common in dodecaphonic music with no tonality.
;; Each note gets one accidental.
((equal? style 'dodecaphonic)
(set-accidentals-properties #f
`(Staff ,(lambda (c p bn mp) '(#f . #t)))
'()
context))
;; 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 canceled across voices.
((equal? style 'modern-voice)
(set-accidentals-properties #f
`(Voice ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
'()
context))
;; same as modernVoiceAccidental eccept that all special accidentals are typeset
;; as cautionaries
((equal? style 'modern-voice-cautionary)
(set-accidentals-properties #f
`(Voice ,(make-accidental-rule 'same-octave 0))
`(Voice ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
context))
;; stone's suggestions for accidentals on grand staff.
;; Accidentals are canceled across the staves in the same grand staff as well
((equal? style 'piano)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0)
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
GrandStaff
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
'()
pcontext))
((equal? style 'piano-cautionary)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0))
`(Staff ,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1)
GrandStaff
,(make-accidental-rule 'any-octave 0)
,(make-accidental-rule 'same-octave 1))
pcontext))
;; same as modern, but cautionary accidentals are printed for all sharp or flat
;; tones specified by the key signature.
((equal? style 'teaching)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0))
`(Staff ,(make-accidental-rule 'same-octave 1)
,teaching-accidental-rule)
context))
;; do not set localKeySignature when a note alterated differently from
;; localKeySignature is found.
;; Causes accidentals to be printed at every note instead of
;; remembered for the duration of a measure.
;; accidentals not being remembered, causing accidentals always to
;; be typeset relative to the time signature
((equal? style 'forget)
(set-accidentals-properties '()
`(Staff ,(make-accidental-rule 'same-octave -1))
'()
context))
;; Do not reset the key at the start of a measure. Accidentals will be
;; printed only once and are in effect until overridden, possibly many
;; measures later.
((equal? style 'no-reset)
(set-accidentals-properties '()
`(Staff ,(make-accidental-rule 'same-octave #t))
'()
context))
;; ADDITION
((equal? style 'dodecaphonic-no-repeat)
(set-accidentals-properties #f
`(Staff ,(make-accidental-rule 'same-octave 0)
,dodecaphonic-no-repeat-rule)
'()
context))
;; END ADDITION
(else
(ly:warning (_ "unknown accidental style: ~S") style)
(make-sequential-music '())))))
%%%%%%%%%%%%%%%%%%%%%%%%% EXAMPLES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
{
\accidentalStyle dodecaphonic-no-repeat
cis'8 fis' c' c' c'
}
musicA = {
<<
\relative c' {
cis'8 fis, bes4 <a cis>8 f bis4 |
cis2. <c, g'>4 |
}
\\
\relative c' {
ais'2 cis, |
fis8 b a4 cis2 |
}
>>
}
musicB = {
\clef bass
\new Voice {
\voiceTwo \relative c' {
<fis, a cis>8[ <fis a cis>
\change Staff = up
cis' cis
\change Staff = down
<fis, a> <fis a>]
\showStaffSwitch
\change Staff = up
dis'4 |
\change Staff = down
<fis, a cis>4 gis <f a d>2 |
}
}
}
%%{
\new PianoStaff {
<<
\context Staff = "up" {
\accidentalStyle dodecaphonic-no-repeat
\musicA
}
\context Staff = "down" {
\accidentalStyle dodecaphonic-no-repeat
\musicB
}
>>
}
%}
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