Re: chord slides

[Patrick Schmidt]

Trevor,

thank you very much for your solution. I managed to achieve what I wanted 
without fully understanding of what's going on. Here's the code:

\version "2.13.3"
\relative c' {
 \new Staff  <<
   \new Voice = "visible" {
     e,16[ e
     \once \override Glissando #'minimum-length = #5
     \once \override Glissando #'springs-and-rods = 
#ly:spanner::set-spacing-rods
     \once \override Glissando #'thickness = #2
     % glissando is attached to b' & c'
     <e' b' e>\glissando <f c' f>]
   }
   \new Voice = "hidden1" {
     s s
     \hideNotes
     % attach glissando to note heads
     \once \override Glissando #'thickness = #2
     e\glissando f
   }
   \new Voice = "hidden2" {
     s s
     \hideNotes
     % attach glissando to note heads
     \once \override Glissando #'thickness = #2
     b\glissando c
   }
 >>
}

As you told me I added another hidden voice. It confuses me that the second 
hidden voice ("hidden2") has to come last even though it's a middle voice. If I 
place "hidden2" before "hidden1" then I don't get a glissando from e1 to f1.

> You have to set the beams manually, which
> means the start and end notes of the beam
> must be in the same voice, hence the spacer
> notes in the example below.
I didn't understand why the spacer notes in the hidden voices are needed. 
Didn't you set the beams manually in the "visible" voice?

>From my point of view it would be more intuitive if it were possible to set 
>glissandi in chords just the way ties are set, e.g.:
 <c e g>\glissando<d fis a>
resulting in one glssando mark for each voice.

But this is probably hard to program and would cause many other code changes ...

Cheers,
Patrick

-------- Original-Nachricht --------
> Datum: Sun, 2 Aug 2009 22:08:38 +0100
> Von: "Trevor Daniels" <address@hidden>
> An: "Patrick Schmidt" <address@hidden>
> CC: "Lilypond-User List" <address@hidden>
> Betreff: Re: chord slides

> 
> Patrick Schmidt wrote Sunday, August 02, 2009 1:50 PM
> >
> > I would like to achieve a chord slide.
> >
> > 1) How come that I can see the glissando marks when I use half 
> > notes but not when I use sixteenths?
> 
> The glissando can often become so short it
> is invisible, as happens here.  It's length
> can be overriden, but it's a bit messy.  The
> method is explained in section 5.4.6 of the
> Notation Reference, and I've given an example
> below.
> 
> > 2) How can I slide chords with more than 2 voices?
> 
> You need to add as many hidden voices as the
> number of notes in the chord less 1.
> 
> > 3) How can I combine the beams of the single notes with those of 
> > the slided chords?
> 
> You have to set the beams manually, which
> means the start and end notes of the beam
> must be in the same voice, hence the spacer
> notes in the example below.
> 
> Below is one approach to your problem.  You
> will have to ignore warnings about clashing
> note columns due to the hidden notes.  I've
> also increased the thickness of the gliss,
> and the length is probably too long - you
> can easily adjust these.
> 
> Trevor
> 
> \version "2.13.3"
> \relative c' {
>   \new Staff  <<
>     \new Voice = "visible" {
>       e,16[ e
>       \once \override Glissando #'minimum-length = #5
>       \once \override Glissando #'springs-and-rods = 
> #ly:spanner::set-spacing-rods
>       \once \override Glissando #'thickness = #2
>       % glissando is attached to b' & c'
>       <e' b'>\glissando <f c'>]
>     }
>     \new Voice = "hidden" {
>       s s
>       \hideNotes
>       % attach glissando to note heads
>       \once \override Glissando #'thickness = #2
>       e\glissando f
>     }
>   >>
> }

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