Re: Multiple voices - aligning stems, different durations

[Bric]

Sorry about top-posting (is it okay?)

So, some of the error messages can only be read if you launch denemo from the 
command line (showing at the command line)

experiencing a new typesetting error, where the rendering window is showing a 
minimal staff fragment with the clef and the message "INVALID! try Score->Check 
Score command"

I go to "Score -> Check Score" and get "No problem detected in this score"

(Also, sometimes you get "cursor may have moved to the error" - you look at the 
cursor and see no problem.)

Running denemo in verbose mode ( -V ) i see:

denemo - CRITICAL: Call to find_xes_in_measure for bad measure number 35

there is no measure 35; the editor shows 34 as the last measure.  

I'm stuck.


> On 09/10/2024 5:36 AM EDT Richard Shann <richard@rshann.plus.com> wrote:
> 
>  
> On Mon, 2024-09-09 at 16:52 -0400, Bric wrote:
> > 
> > > On 09/09/2024 2:23 PM EDT Richard Shann <richard@rshann.plus.com>
> > > wrote:
> > > 
> > >  'Screenshot from 2024-09-09 16-44-42.png'
> > > On Mon, 2024-09-09 at 12:28 -0400, Bric wrote:
> > > >  Experiencing complete failure with voices. 
> > > >    
> > > >  Is there comprehensive documentation on how to use voices? 
> > > >    
> > > >  At the moment I am thinking I need multiple voices per staff
> > > > because
> > > > ordinary chords do not allow notes with different durations on
> > > > the
> > > > same (shared) staff, aligned vertically (where, in spite of the
> > > > different duration they all START simultaneously).
> > > 
> > > correct, that is what they are for
> > > 
> > > >  Example: 
> > > >    
> > > >  
> > > >    
> > > >  I added a staff with a designated new voice... I can't even get
> > > > past
> > > > the rendering error -- "Typeset" leads to "Check Score. Cursor
> > > > may
> > > > have been moved..." when I populate the extra voice with any
> > > > notes 
> > > 
> > > can you post an example of such a thing?
> > > 
> > 
> > 
> > I guess this mailing list defaults to text-only formatting?
> > 
> > (had HTML for my previous message)
> > 
> > attaching images in that case
> > 
> > The rendering error screenshot shows the top two voice notes _next_
> > to each other rather than aligned one above the other.
> > 
> > by the way - typically the render errors are non-descriptive (error
> > specifics do not surface)
> 
> To see the exact error messages that LilyPond is emitting typeset in
> the LilyPond View. In the case of your file it is just a warning that
> you have your two voices clashing - the warning message is:
> 
> Typesetting ...Done
> /tmp/Denemo_7RIET2/denemoprintA.ly:50:10: warning: this Voice needs a
> \voiceXx or \shiftXx setting
>          
>          e''4 d'' c''\AutoBarline
> /tmp/Denemo_7RIET2/denemoprintA.ly:50:15: warning: this Voice needs a
> \voiceXx or \shiftXx setting
>          e''4 
>               d'' c''\AutoBarline
> /tmp/Denemo_7RIET2/denemoprintA.ly:50:19: warning: this Voice needs a
> \voiceXx or \shiftXx setting
>          e''4 d'' 
>                   c''\AutoBarline
> /tmp/Denemo_7RIET2/denemoprintA.ly:51:10: warning: this Voice needs a
> \voiceXx or \shiftXx setting
>          
>          c'' d'' c''8 d''}
> /tmp/Denemo_7RIET2/denemoprintA.ly:51:18: warning: this Voice needs a
> \voiceXx or \shiftXx setting
>          c'' d'' 
>                  c''8 d'...
> 
> The reason for the error is that while you have set the top staff to be
> Voice 2 you have not set the direction of the second staff, so it is
> defaulting to automatic voice (up or down stems depend on above/below
> mid line of staff).
> You can use the command
> 
> Command: Choose Voice
> The Voice 1,2,3,4 commands set up the voices so that first and third
> voices get stems up, second and fourth voices get stems down, third and
> fourth voice note heads are horizontally shifted, and rests in the
> respective voices are automatically moved to avoid collisions. The
> Automatic Voice command returns all the voice settings to the neutral
> default directions. The Denemo display shows automatic stem directions,
> use StemDown and StemUp commands if you wish to affect the display. 
> Location: Object Menu ▶ Directives ▶ Typesetter ▶ Voices
> 
> to set the voice (and to change it mid-music if needed)
> 
> HTH
> 
> Richard
> 
> 
> 
> > 
> > 
> > > 
> > > >    
> > > >  I apparently don't know the basics of voices 
> > > >    
> > > >  So my questions are: 
> > > >    
> > > >  1. How do I make voices work?  
> > > >  2. How do I make the notes of different voices vertically align
> > > > perfectly ? 
> > > 
> > > That happens automatically
> > > 
> > > >  3. (#2 with different durations vertically aligned in spite of
> > > > that
> > > > difference)
> > > 
> > > also automatic
> > > 
> > > >  
> > > >  4. (I am assuming I can figure out stem direction on my own,
> > > > although it would be nice if there is a smart algorithm that
> > > > automatically assigns stem direction, as shown in the embedded
> > > > image
> > > > here) 
> > > You use the 
> > > Command: Choose Initial Voice
> > > Choose which voice this staff will initially be set to. To change
> > > voice
> > > during music see the Directives->Voices menu.
> > > Location: Object Menu ▶ Staffs/Voices ▶ Voices
> > > Internal Name: InitialVoice
> > > 
> > > and then commands like
> > > 
> > > Command: Voice Preset 1 (Stems Up)
> > > Preset for first voice. Stems up
> > > Location: Object Menu ▶ Directives ▶ Typesetter ▶ Voices
> > > Internal Name: VoicePreset1
> > > 
> > > and friends if you need to switch stem direction mid music.
> > > 
> > > HTH
> > > 
> > > Richard Shann
> > > 
> > > >    
> > > >