input/lsr/integrating-text-indications-in-metronome-marks.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 "2.11.48"
   4
   5 \header {
   6   lsrtags = "rhythms, text"
   7
   8   texidoc = "
   9 This function allows you to change the tempo and specify text
  10 directions at the same time, using one single command.It takes three
  11 arguments: the text to be printed (the string has to be introduced with
  12 a # character), the duration (it has to be specified as a text string,
  13 between double quotes and with a #), and the metronome tempo (as a
  14 number). This way, the given tempo will be taken into account in MIDI
  15 output, but the normal @code{\\tempo} command will remain unaffected.
  16
  17 "
  18   doctitle = "Integrating text indications in metronome marks"
  19 } % begin verbatim
  20 #(define ((make-format-movement-markup-function text) duration count context)
  21  (markup #:huge #:bold text #:hspace 1
  22          "("
  23          #:general-align Y DOWN #:smaller
  24             #:note-by-number (ly:duration-log duration)
  25                              (ly:duration-dot-count duration)
  26                              1
  27          "="
  28          (number->string count)
  29          ")"))
  30
  31
  32 #(define (string->duration duration-string)
  33  "Parse the `duration-string', e.g. ''4..'' or ''breve.'', and return a duration object."
  34  (let* ((length (string-length duration-string))
  35         (dot-index (or (string-index duration-string #\.) length))
  36         (len (substring duration-string 0 dot-index))
  37         (dots (- length dot-index)))
  38   (ly:make-duration (cond ((string=? len "breve") -1)
  39                           ((string=? len "longa") -2)
  40                           ((string=? len "maxima") -3)
  41                           (else (log2 (string->number len))))
  42                     dots 1 1)))
  43
  44 movement =
  45 #(define-music-function (parser location text duration count music)
  46
  47                        (string? string? integer? ly:music?)
  48  #{
  49    \set Score.metronomeMarkFormatter = #(make-format-movement-markup-function $text)
  50    \set Score.tempoWholesPerMinute = #$(ly:moment-mul (ly:make-moment count 1)
  51                                          (ly:duration-length
  52                                            (string->duration duration)))
  53    \set Score.tempoUnitDuration = #$(string->duration duration)
  54    \set Score.tempoUnitCount = #$count
  55    $music
  56    \set Score.metronomeMarkFormatter = #format-metronome-markup
  57  #})
  58
  59 \layout { ragged-right = ##f }
  60
  61 \relative c' {
  62   \time 3/4
  63   \movement "Allegro" "2." #96
  64   c2 e4
  65   g2.
  66   \movement "Moderato" "4" #104
  67   f4 e d
  68   \tempo 4 = 92
  69   c2.
  70 }