input/lsr/creating-a-sequence-of-notes-on-various-pitches.ly

   1 %% Do not edit this file; it is auto-generated from LSR http://lsr.dsi.unimi.it
   2 %% This file is in the public domain.
   3 \version "2.11.55"
   4
   5 \header {
   6   lsrtags = "pitches"
   7
   8   texidoces = "
   9 En una música que tenga muchas apariciones de la
  10 misma secuencia de notas a distintas alturas, podría ser de
  11 utilidad la siguiente función musical.  Admite una nota, de la que
  12 sólo se utiliza su altura.  Las funciones de apoyo en Scheme se
  13 han tomado prestadas del documento de \"Consejos y trucos\" de la
  14 versión 2.10 del manual.  Este ejemplo crea las duraciones
  15 rítmicas que se usan a todo lo largo de «Marte», de «Los Planetas»
  16 de Gustav Holst.
  17
  18 "
  19   doctitlees = "Crear una secuencia de notas a distintas alturas"
  20
  21   texidoc = "
  22 In music that contains many occurrences of the same sequence of notes
  23 at different pitches, the following music function may prove useful.
  24 It takes a note, of which only the pitch is used.  The supporting
  25 Scheme functions were borrowed from the \"Tips and tricks\" document in
  26 the manual for version 2.10.   This example creates the rhythm used
  27 throughout Mars, from Gustav Holst's The Planets.
  28
  29 "
  30   doctitle = "Creating a sequence of notes on various pitches"
  31 } % begin verbatim
  32 #(define (make-note-req p d)
  33   (make-music 'NoteEvent
  34    'duration d
  35    'pitch p))
  36
  37 #(define (make-note p d)
  38   (make-music 'EventChord
  39    'elements (list (make-note-req p d))))
  40
  41 #(define (seq-music-list elts)
  42   (make-music 'SequentialMusic
  43    'elements elts))
  44
  45 #(define (make-triplet elt)
  46   (make-music 'TimeScaledMusic
  47    'denominator 3
  48    'numerator 2
  49    'element elt))
  50
  51
  52 rhythm = #(define-music-function (parser location note) (ly:music?)
  53           "Make the rhythm in Mars (the Planets) at the given note's pitch"
  54           (let* ((p (ly:music-property
  55                       (car (ly:music-property note 'elements))
  56                       'pitch)))
  57           (seq-music-list (list
  58             (make-triplet (seq-music-list (list
  59               (make-note p (ly:make-duration 3 0 2 3))
  60               (make-note p (ly:make-duration 3 0 2 3))
  61               (make-note p (ly:make-duration 3 0 2 3))
  62             )))
  63             (make-note p (ly:make-duration 2 0))
  64             (make-note p (ly:make-duration 2 0))
  65             (make-note p (ly:make-duration 3 0))
  66             (make-note p (ly:make-duration 3 0))
  67             (make-note p (ly:make-duration 2 0))
  68           ))))
  69
  70 \score {
  71   \new Staff {
  72     \time 5/4
  73     \rhythm c'
  74     \rhythm c''
  75     \rhythm g
  76   }
  77 }