\version "2.16.2"
\pointAndClickOff

boxes = {
  \tempo\markup\concat { 
    \general-align #Y #DOWN \note #"4" #1
    " = 126   Swing"
  } 
  \partial 4 s4
  % mes.1
    s1^\markup { \rounded-box "Chorus 1" } 
    s1*3
  % mes.5
    s1^\markup { \rounded-box "Chorus 2" } 
}

accords = \chords {
  \set chordChanges = ##t
  \partial 4
  s4
  cis1:3-.5-.7                           % 1
  fis:7
  a:m7
  d:7
  
  d:m7                                   % 5
  g:7
  bes2:7sus4    b:7.9-.10-.11+.13-
  c:maj7        f:7sus4

} % accords

musique = \relative c''
{
  \clef treble
  \time 4/4
  \key g \major
  \partial 4 
  b4-^                                                            \bar "||"

  fis'2~ fis8 g a fis~        \bar "|" % 1
  fis2. g8 d~                                                     \bar "|"
  d2 g4-^ c,8 b~                                                  \bar "|"
  b2. r4                                                          \break

  r8 e~ e4 a,8 c r g'         \bar "|" % 5
  \times 2/3 { e f e~ } e4 r8 g ees[ d]                           \bar "|"
  r8 g, g[ g] r8 g g[ d']                                         \bar "|"
  r8 g g[ g] r8 g, a[ c]                                          \break


} % musique

<<
  \new Dynamics % <= la portée fictive
    \with { \override TextScript #'padding = #3.5 } % <= j'ajoute un peu d'espace
    \boxes
  \chords { \accords }
  \new Staff { \musique }
>>