\version "2.16.2" 
\language "english"


global = {
  \key a \major
  \numericTimeSignature
  \time 2/2
  \tempo 2=60
}






leftOrgan = %\transpose a g 
\relative c { 
  \global
 
  <<{ <fs'^~ a,_~>1  | q2 <d b>2 | <e cs>1^~ | <e_~ cs>2 <e b_~>4 <ds b>4 }\\{ e4 d2.^~ | d2 s2 | b2 a2 | a1 }>> \bar"||"	% 17-20
  \key e\major <<{ e'2 ds2 | cs2. b4 | }\\{ <b gs>1 | <a e~>2 e4~ e4 |}>>	% 21-22
  
}








organPart = <<
  \new PianoStaff \with {
    instrumentName = "Org."
    shortInstrumentName = "Org."
  } <<
   
    \new Staff = "left" \with {
      midiInstrument = "church organ"
    } { \clef bass \leftOrgan }
  >>
  
>> 





\markup " no transpose taken start key from A-major then changed to E-major"
\score { 
  <<
   
    \organPart
   
  >>
  \layout {          }

  \midi {     }
}

\markup "transpose from A to G : E was transposed to D without specifying"
\score { \transpose a g
  <<
   
    \organPart
   
  >>
  \layout {          }

  \midi {     }
}