-%% Do not edit this file; it is auto-generated from LSR http://lsr.dsi.unimi.it
-%% This file is in the public domain.
-\version "2.12.3"
-
-\header {
- lsrtags = "pitches"
-
-doctitlees = "Transportar música con el menor número de alteraciones"
-texidoces = "
-Este ejemplo utiliza código de Scheme para forzar las
-modificaciones enarmónicas de las notas, y así tener el menor
-número de alteraciones accidentales. En este caso se aplican las
-siguientes reglas:
-
-@itemize
-@item
-Se quitan las dobles alteraciones
-
-@item
-Si sostenido -> Do
-
-@item
-Mi sistenido -> Fa
-
-@item
-Do bemol -> Si
-
-@item
-Fa bemol -> Mi
-
-@end itemize
-
-De esta forma se selecciona el mayor número de notas enarmónicas
-naturales.
-
-"
-
-doctitlede = "Noten mit minimaler Anzahl an Versetzungszeichen transponieren."
-
-texidocde = "Dieses Beispiel benutzt Scheme-Code, um enharmonische
-Verwechslungen für Noten zu erzwingen, damit nur eine minimale Anzahl
-an Versetzungszeichen ausgegeben wird. In diesem Fall gelten die
-folgenden Regeln:
-
-@itemize
-@item
-Doppelte Versetzungszeichen sollen entfernt werden
-
-@item
-His -> C
-
-@item
-Eis -> F
-
-@item
-Ces -> B
-
-@item
-Fes -> E
-
-@end itemize
-
-Auf diese Art werden am meisten natürliche Tonhöhen als enharmonische
-Variante gewählt.
-"
-
-
- texidoc = "
-This example uses some Scheme code to enforce enharmonic modifications
-for notes in order to have the minimum number of accidentals. In this
-case, the following rules apply:
-
-Double accidentals should be removed
-
-
-B sharp -> C
-
-
-E sharp -> F
-
-
-C flat -> B
-
-
-F flat -> E
-
-
-In this manner, the most natural enharmonic notes are chosen.
-
-"
- doctitle = "Transposing pitches with minimum accidentals (\"Smart\" transpose)"
-} % begin verbatim
-
-#(define (naturalize-pitch p)
- (let ((o (ly:pitch-octave p))
- (a (* 4 (ly:pitch-alteration p)))
- ;; alteration, a, in quarter tone steps,
- ;; for historical reasons
- (n (ly:pitch-notename p)))
- (cond
- ((and (> a 1) (or (eq? n 6) (eq? n 2)))
- (set! a (- a 2))
- (set! n (+ n 1)))
- ((and (< a -1) (or (eq? n 0) (eq? n 3)))
- (set! a (+ a 2))
- (set! n (- n 1))))
- (cond
- ((> a 2) (set! a (- a 4)) (set! n (+ n 1)))
- ((< a -2) (set! a (+ a 4)) (set! n (- n 1))))
- (if (< n 0) (begin (set! o (- o 1)) (set! n (+ n 7))))
- (if (> n 6) (begin (set! o (+ o 1)) (set! n (- n 7))))
- (ly:make-pitch o n (/ a 4))))
-
-#(define (naturalize music)
- (let ((es (ly:music-property music 'elements))
- (e (ly:music-property music 'element))
- (p (ly:music-property music 'pitch)))
- (if (pair? es)
- (ly:music-set-property!
- music 'elements
- (map (lambda (x) (naturalize x)) es)))
- (if (ly:music? e)
- (ly:music-set-property!
- music 'element
- (naturalize e)))
- (if (ly:pitch? p)
- (begin
- (set! p (naturalize-pitch p))
- (ly:music-set-property! music 'pitch p)))
- music))
-
-naturalizeMusic =
-#(define-music-function (parser location m)
- (ly:music?)
- (naturalize m))
-
-music = \relative c' { c4 d e g }
-
-\score {
- \new Staff {
- \transpose c ais { \music }
- \naturalizeMusic \transpose c ais { \music }
- \transpose c deses { \music }
- \naturalizeMusic \transpose c deses { \music }
- }
- \layout { }
-}