Re: command for 'sequences'?

[Rune Zedeler]

jos wrote:

> I have a lilypond question: is there a command for
> making sequences of notes?

Not a command but it's easy in scheme
Notice how I just use the lilypond transpose for keys different from C
major.

\version "1.4.1"


#(define  ((shift-pitch amount) p)
  (let* ((o (pitch-octave p))
         (a (pitch-alteration p))
         (n (pitch-notename p)))

    (set! n (+ amount n))
    (while (< n 0) (begin (set!  o (- o 1)) (set! n (+ n 7))))
    (while (> n 6) (begin (set!  o (+ o 1)) (set! n (- n 7))))

    (make-pitch o n a)))

#(define ((shift amount) music)
  (let* ((es (ly-get-mus-property music 'elements))
         (e (ly-get-mus-property music 'element))
         (p (ly-get-mus-property music 'pitch))
         (body (ly-get-mus-property music 'body))
         (alts (ly-get-mus-property music 'alternatives)))

    (if (pair? es)
        (ly-set-mus-property
         music 'elements
         (map (shift amount) es)))

    (if (music? alts)
        (ly-set-mus-property
         music 'alternatives
         ((shift amount) alts)))

    (if (music? body)
        (ly-set-mus-property
         music 'body
         ((shift amount)  body)))

    (if (music? e)
        (ly-set-mus-property
         music 'element
         ((shift amount) e)))

    (if (pitch? p)
        (begin
          (set! p ((shift-pitch amount) p))
          (ly-set-mus-property music 'pitch p)))

    music))



sega = \notes \relative c' <
  \context Voice=va {\stemUp e8^4 f e g^5 d^2 e}
  \context Voice=vb {\stemDown c4._2 b_1 }
>
segb = \notes \relative c'' <
  \context Voice=va {\stemUp e4.^4 f^5 }
  \context Voice=vb {\stemDown c8_2 b c a d^4 c }
>

sequence = \notes {
  \sega
  \apply #(shift 1) \sega
  \apply #(shift 2) \sega
  \apply #(shift 3) \sega
  \apply #(shift 4) \sega
  \apply #(shift 5) \sega
  \apply #(shift 6) \sega
  \segb
  \apply #(shift -1) \segb
  \apply #(shift -2) \segb
  \apply #(shift -3) \segb
  \apply #(shift -4) \segb
  \apply #(shift -5) \segb
  \apply #(shift -6) \segb
  <
    \context Voice=va {\stemUp e'2.}
    \context Voice=vb {\stemDown c'2.}
  >
}

\score {
  \notes \context Staff {
    \time 6/8
    \sequence
    \transpose g' \sequence
    \transpose d' \sequence
    \transpose a' \sequence
  }
  \paper { }
  \midi { \tempo 8=180 }
}