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List:       lilypond-user
Subject:    Need help with voices and staves
From:       George_ <georgexu149 () gmail ! com>
Date:       2010-11-30 6:32:24
Message-ID: 30337315.post () talk ! nabble ! com
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I'm transcribing Bach's Fugue No. 20 in A minor from the Well-Tempered
Clavier Bk. 1, and I've run into a bit of a problem:

% Created on Tue Nov 30 08:26:15 NZDT 2010
\version "2.13.40"

\header {
	title = "Fugue XX" 
 subtitle = "A Minor, BWV 865" 
 	composer = "J. S. Bach"

}



staffPiano = \new PianoStaff {
	\set PianoStaff.midiInstrument = #"acoustic grand"
		\time 4/4
					\override Score.MetronomeMark #'stencil = ##f
			\tempo 4 = 80 
			<<
		\new Staff = "RH" { << % Right hand 
			\clef treble
			\key a \minor
			\relative c' {
			<<
				%This is Voice One
				{
					%1
					\change Staff = "LH"
					r8 a16 gis a8 b 
					\change Staff = "RH"
					c c16 b c8 d |
					%2
					e16 d c d e8 f
					\change Staff = "LH"
					gis, e r a |
					%3
					b16 c a b
					\change Staff = "RH"
					c d b c d8 c b e |
					%4
					b' \rest e,16 dis e8 fis g g16 fis g8 a |
					%5
					b16 a g a b8 c dis, b b' \rest e, |
					%6
					\stemUp fis16 g e fis g a fis g a8 g fis b |
					%7
					e, fis16 gis a b c d e8 a, gis4 |
					%8
					a8 a g f e c' b a |
					%9
					gis e' d c b16 c d b c b a c |
					%10
					d e f d e4 ~ e8 a, b16 c d8 ~ |
				} \\ 
				%This is Voice Two
				{
					s1 s1 s1
					%4
					\change Staff = "LH"
					a,4 g8 fis e c' b a |
					%5
					g16 fis e fis g8 a b16 a g a b8 c ~ |
					%6
					c b16 a b8 \change Staff = "RH" e ~ e d16 cis d4 ~ |
					%7
					d8 c16 b c4 ~ c16 a' g f e d c b |
					%8
					c16 b c4 d8 e16 d e4 f8 ~ |
					%9
					f16 fis e fis gis8 a b4 e,8 \rest a |
					%10
					g4 ~ g16 f e g fis4 gis |
					%11
					
					%12
					
					%13
					
					%14
					
					%15
					
				}
				>>
			}
		>>
		}
		\new Staff = "LH" {  % Left hand
			\clef bass
			\key a \minor
			\relative c {
			<<
				%This is Voice Three
				{
					\stemDown s1 s1 s1 s1 s1 s1 s1
					%8
					\change Staff = "LH"
					f8 \rest a,16 gis a8 b c c16 b c8 d |
					%9
					e16 d c d e8 f gis, e d' \rest a |
					%10
					b16 c a b cis d b cis d8 c b e |
					%11
					
					%12
					
					%13
					
					%14
					
					%15
					
				} \\
				%This is Voice Four
				{
					s1 s1 s1 s1 s1 s1 s1 s1 s1 s1
					%11
					\change Staff = "LH"
					f8 \rest e16 dis e8 fis g g16 fis g8 a |
					%12
					b16 a g a b8 c dis, b f' \rest e |
					%13
					fis16 g e fis g a fis g a8 g fis b |
					%14
					e,4 b'8 a gis e fis gis |
					%15
					a e' \rest e4 \rest e8 \rest a, b cis |
				}
			>>
			}
		}
	>>
}



\score {
	<<
		\staffPiano
	>>
	
	\midi {
	}

  \layout {
  }
}

\paper {
}


When I get to bar 11 and the fourth voice comes in the output
becomes...strange. The First voice moves into the bottom staff and the first
note in bar 8 now has the stem coming from the middle of the note - but when
I change the rest to s8 in reference to the error I get, the stem moves back
to its normal position (why is that, anyway?).

I'm using LilypondTool, and I modified the Piano template to get the extra
voice per staff. It's probably not the best in the world, but it's the best
I know how to do with my limited knowledge.
-- 
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