Hi all,
FWIW, here's something which tabulates the notes used in an excerpt and
presents them in ascending order.
I think this might be useful in handbell music (which the example assuredly
is not).
Any suggestions for improving this are welcome.
--David
\version "2.18"
#(define (get-pitch elt)
(ly:music-property elt 'pitch))
#(define (extract-pitches lst result)
(cond
((null? lst) result)
((ly:pitch? (get-pitch (car lst)))
(set! result (append result (list (get-pitch (car lst)))))
(extract-pitches (cdr lst) result))
((ly:music-property (car lst) 'elements)
(append
(extract-pitches (ly:music-property (car lst) 'elements) result)
(extract-pitches (cdr lst) '())))
(else (extract-pitches (cdr lst) result))))
extractPitches =
#(define-scheme-function
(parser location lst)
(ly:music?)
(extract-pitches
(extract-named-music lst '(EventChord NoteEvent))
'()))
%% quoted/adapted from http://lsr.di.unimi.it/LSR/Snippet?id=122
#(define (make-note-req p d)
(make-music 'NoteEvent
'duration d
'pitch p))
#(define (make-note elts)
(make-music 'EventChord
'elements elts))
#(define (seq-music-list elts)
(make-music 'SequentialMusic
'elements elts))
notesFromPitchList =
#(define-scheme-function
(parser location lst)
(list?)
(seq-music-list
(map
(lambda (pitch)
(make-note (list (make-note-req pitch (ly:make-duration 2 0)))))
(sort
(delete-duplicates lst)
(lambda (a b) (ly:pitch<? a b))))))
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% EXAMPLE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Music taken from http://www.lilypond.org/doc/v2.19/Documentation/b9/lily-02539259.ly
global = { \key g \minor}
partI = \relative c' {
\voiceOne
fis8 d' ees g, fis4 g
r8 a16 bes c8 bes16 a d8 r r4
r2 r8 d16 ees f8 ees16 d
ees4 ~ 16 d c bes a4 r8 ees'16 d
c8 d16 ees d8 e16 fis g8 fis16 g a4 ~
8 d, g f ees d c bes
a2 g\fermata \bar "|."
}
partII = \relative c' {
\voiceTwo
d4 r4 r8 d'16 c bes8 c16 d
ees8 d c ees a, r r4
r8 fis16 g a8 g16 fis g2 ~
2 r8 d' ees g,
fis4 g r8 a16 bes c8 bes16 a
bes4. <g b>8 <a c> r <d, g> r
<ees g>4 <d fis> d2
}
partIII = \relative c' {
\voiceOne
r2 r8 d ees g, fis4 g r8 a16 bes c8 bes16 a
bes2 ~ 8 b16 a g8 a16 b
c4 r r2
R1
r8 d ees g, fis4 g
r8 a16 bes c8 bes16 a b2
}
partIV = \relative c {
\voiceTwo
d4 r r2
r8 d ees g, fis4 a
d,8 d'16 c bes8 c16 d ees2 ~
8 ees16 d c8 d16 ees fis,8 a16 g fis8 g16 a
d,8 d'16 c bes8 c16 d ees8 c a fis'
g f ees d c bes a g
c a d d, g2\fermata
}
%% \score and \layout must be stripped when assigning music expression to variable?
Bach =
<<
\set Score.currentBarNumber = #28
\bar ""
\new PianoStaff <<
\new Staff = "RH" <<
\global
\new Voice = "voiceI" { \partI }
\new Voice = "voiceII" { \partII }
>>
\new Staff = "LH" <<
\clef "bass"
\global
\new Voice = "voiceIII" { \partIII }
\new Voice = "voiceIV" { \partIV }
>>
>>
>>
%% full score
\score {
\Bach
\layout {
\context {
\Staff
\remove "Time_signature_engraver"
}
\context {
\PianoStaff
\override StaffGrouper.staff-staff-spacing.padding = #1
}
}
}
% How many notes?
\markup {
\line {
"There are"
#(number->string
(length
(delete-duplicates
#{ \extractPitches \Bach #})))
"different pitches in this excerpt."
}
}
%% pitches used in example, in ascending order
\markup \vspace #1
\markup { Notes used: }
notesUsed = \notesFromPitchList \extractPitches \Bach
\score {
\new StaffGroup <<
\new Staff = "up" {
\global
#(skip-of-length #{ \notesUsed #})
}
\new Staff = "down" {
\clef bass
\global
\autochange { \notesUsed }
}
>>
}
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