input/test/music-box.ly

   1 \version "2.1.7"
   2 \include "deutsch.ly"
   3 % possible rename to scheme- something.  -gp
   4 % TODO: ask if it needs to have so many empty bars in the middle.  -gp
   5 \header{ texidoc = "@cindex Scheme Music Box
   6 This example shows prelude in C major of WTK1, but coded
   7 using Scheme functions to avoid typing work. " }
   8
   9
  10 #(define (transform music)
  11   (let* ((es (ly:get-mus-property music 'elements))
  12          (n  (ly:music-name music))
  13         )
  14    (if (not (equal? n "Sequential_music"))
  15      (ly:warn "transform needs sequential music!")
  16      (begin
  17       (let recurse ((elts es))
  18        (if (not (equal? elts '()))
  19          (begin
  20            ((trans (ly:get-mus-property (cadr elts) 'elements)) (car elts))
  21            (set-cdr! elts (cddr elts))
  22            (recurse (cdr elts))
  23          )
  24        )
  25       )
  26      )
  27    )
  28    music
  29   )
  30  )
  31
  32 #(define ((trans pitches) music)
  33   (let* ((es (ly:get-mus-property music 'elements))
  34          (e (ly:get-mus-property music 'element))
  35          (p (ly:get-mus-property music 'pitch)))
  36
  37     (if (pair? es)
  38         (ly:set-mus-property!
  39          music 'elements
  40          (map (trans pitches) es)))
  41
  42     (if (ly:music? e)
  43         (ly:set-mus-property!
  44          music 'element
  45          ((trans pitches) e)))
  46
  47     (if (ly:pitch? p)
  48        (let* ((o (ly:pitch-octave p))
  49               (n (ly:pitch-notename p))
  50               (i (+ (* 7 o) n))
  51               (pes (ly:get-mus-property (list-ref pitches i) 'elements))
  52               (pnew (ly:get-mus-property (car pes) 'pitch))
  53              )
  54           (ly:set-mus-property! music 'pitch pnew)
  55         )
  56     )
  57     music
  58   )
  59  )
  60
  61
  62
  63
  64
  65 \version "2.1.7"
  66
  67 pat = \notes \transpose c c' \repeat unfold 2 {
  68   << { \context Staff=up {r8 e16 f g e f g } }
  69     { \context Staff=down <<
  70       \context Voice=vup  { \stemUp \tieUp r16 d8.~d4 }
  71       \context Voice=vdwn { \stemDown  c2 }
  72     >> }
  73   >>
  74 }
  75
  76 enda = \notes { r8 f,16 a, c f c a, \stemUp c \change Staff = down
  77       a, f, a, f, d, f, d, \change Staff = up \stemBoth
  78       r8 g16 h d' f' d' h d' h g h d f e\prall d <e g c'>1^\fermata \bar "|."
  79 }
  80 endb = \notes {\stemUp \tieUp r16 c,8.~c,4~c,2 r16 h,,8.~h,,4~h,,2 c,1 \bar "|."}
  81 endc = \notes {\stemDown \tieDown c,,2~c,, c,,~c,, c,,1_\fermata }
  82
  83 \score {
  84   \notes \transpose c c' \context PianoStaff <<
  85     \context Staff=up   { \clef "G"  }
  86     \context Staff=down { \clef "F" }
  87     { \apply #transform {\pat {c e g c' e' }
  88                          \pat {c d a d' f' }
  89                          \pat {h, d g d' f' }
  90                          \pat {c e g c' e' }
  91                      }
  92
  93       %{
  94       %Etc.
  95
  96       %we get the idea now.
  97
  98
  99
 100                          \pat {c e a e' a' }
 101                          \pat {c d fis a d'  }
 102                          \pat {h, d g d' g' }
 103                          \pat {h, c e g c' }
 104                          \pat {a, c e g c'  }
 105                          \pat {d, a, d fis c' }
 106                          \pat {g, h, d g h }
 107                          \pat {g, b, e g cis'  }
 108                          \pat {f, a, d a d' }
 109                          \pat {f, as, d f h }
 110                          \pat {e, g, c g c' }
 111                          \pat {e, f, a, c f }
 112                          \pat {d, f, a, c f }
 113
 114                          \pat {g,, d, g, h, f }
 115                          \pat {c, e, g, c e }
 116                          \pat {c, g, b, c e }
 117                          \pat {f,, f, a, c e  }
 118                          \pat {fis,, c, a, c es }
 119                          \pat {as,, f, h, c d }
 120                          \pat {g,, f, g, h, d }
 121                          \pat {g,, e, g, c e }
 122                          \pat {g,, d, g, c f }
 123                          \pat {g,, d, g, h, f }
 124                          \pat {g,, es, a, c fis }
 125                          \pat {g,, e, g, c g }
 126                          \pat {g,, d, g, c f }
 127                          \pat {g,, d, g, h, f }
 128                          \pat {c,, c, g, b, e }
 129                         %}
 130     }
 131   >>
 132   \paper {
 133     \translator {
 134       \PianoStaffContext
 135       VerticalAlignment \override #'forced-distance = #10
 136     }
 137
 138     linewidth = 18.0 \cm
 139   }
 140   \midi {
 141       \tempo 4 = 80
 142   }
 143 }
 144