Re: Possible bug with \oneVoice involving rests

[Urs Liska]

Am 02.06.2014 09:51, schrieb Brian Eve:
> \version "2.18.2-1"
>
> {
> \clef bass
> \compressFullBarRests
> \override Rest #'staff-position = #0
>    R1*6
> <<        g4. e >> << f d >> <<e4 d >>
>    a1
>    R1*6
> <<        b8 e8 >>
>    r8 r4 r2
>    R1*6
>    R1
>    r
>    R
> }

No, that's very wrong code.

With these << >> you are actually telling LilyPond to print independent 
voices while you want to write chords.
This may work in your example but you would definitely run into problems 
very soon.


\version "2.18.2-1"


{

\clef bass

\compressFullBarRests

R1*6

<g e >4. < f d > <e d >4

a1

R1*6

<b e >8

r8 r4 r2

R1*6

R1

r

R

}


Is the correct way to write your example.
But I assume this is not what you _want_ - you will want to have the 
polyphonic part with independent stems.


This is the smartest way to write what you want because it makes the 
voicing right automatically:


\version "2.18.2-1"


{

\clef bass

\compressFullBarRests

R1*6

<<

{

g4. f e4

} \\

{

e4. d d4

}

>>

a1

R1*6

<<

{

b8

} \\

{

e8

}

>>

r8 r4 r2

R1*6

R1

r

R

}


This construct (with the "\\") creates \voiceOne, \voiceTwo etc. implicitly.


Read
http://lilypondblog.org/2013/07/voice-contexts-in-temporary-polyphonic-sections/
and particularly the chapter from the Notation Reference that is linked 
in that article.


HTH
Urs