Re: Resolving "cannot resolve rest collision: rest direction not set"warnings

[Arle Lommel]

Here is a minimal (real) example of one measure that generates four warnings. As you can see the rests in the third voice are simply invoked as "r4" while the ones in the second voice are given explicit locations (which, again, I want to do in this case). (I realize the notation convention here is a bit strange, but the composer used these quasi-grace sorts of things to indicate his ornamentation, but he also gave them full musical time values and rests and so forth.)

\version "2.16.1"

\parallelMusic #'(ossia ornaments righthand lefthand pedal) {

  s2. |

  \tiny \stemUp c''4\rest c8\rest^\pp \ottava #1 d'32[ a' d, a] \ottava #0 c,8\rest d32[ a' d, a] |

  r4 r4 <d' fis>4 |

  s2. |

  s2. |

}

\score {

  \new StaffGroup

  <<

    \new PianoStaff

    <<

      \new Staff = "RH" {

        \clef treble

        \key d \major

        \time 3/4

        <<

          { \new Voice="ossiaVoice" \relative c' { \ossia } }

        \\

          { \new Voice="ornamentsVoice" \relative c' { \ornaments } }

        \\

          { \new Voice="rightVoice" \relative c' { \righthand } }

        >>

        

      }

      \new Staff = "LH" {

        \set doubleSlurs = ##t

        \clef bass

        \key d \major

        \time 3/4

        <<

          { \new Voice = "leftVoice" \relative c { \lefthand } }

          \new Dynamics = "dynamicsVoice" { \pedal }

        >>

      }

    >>

  >>

}

I've looked at the link you shared Trevor, but the application to this issue isn't necessarily obvious to me, other than that it makes me wonder if I need to change the order I declare my voices in or something.

-Arle

On 2012 Dec 19, at 11:50 , "Trevor Daniels" <address@hidden> wrote:

<<
{ \new Voice="ossiaVoice" \relative c' { \ossia } }
\\
{ \new Voice="ornamentsVoice" \relative c' { \ornaments } }
\\
{ \new Voice="rightVoice" \relative c' { \set doubleSlurs = ##t \righthand } }

This construct implicitly assigns the properties of \voiceOne, \voiceTwo etc
in order to the several music expressions separated by \\.  These settings
control the direction of stems, placement of rests, shifts to resolve collisions,
etc.  That is probably not what you want.  This is all explained in
section 1.5.3 of the Notation Reference:
http://www.lilypond.org/doc/v2.17/Documentation/notation/multiple-voices#single_002dstaff-polyphony

The particular error message is probably related to the way
you are positioning the rests in ornamentsVoice, but you don't
say how you are doing that.

Trevor