Re: Function to add a drone staff?

[Gilles]

Hello.

On Thu, 9 Apr 2015 17:35:53 +0200, Sven Axelsson wrote:
> On 9 April 2015 at 17:27, Paul Morris <address@hidden> wrote:
> > Gilles Sadowski wrote
> > > Is there a way (i.e. a function) to automatically add a staff for a
> > > bagpipe's drone note(s)?
> >
> > Hi, Here's a start, a function to change all the pitches of a melody 
> > to a
> > given pitch.  Not tested on real music... (Since you only want the 
> > drone
> > notes in midi maybe you don't need to deal with chords, which makes 
> > the
> > coding simpler.)
> >
> > HTH,
> > -Paul
> >
> > Hat tip to David Kastrup for this example:
> >
> > https://lists.gnu.org/archive/html/lilypond-user/2012-03/msg00621.html
> >
> > %%%%%%%%%%%%%%%
> >
> > dronify =
> > #(define-music-function (parser location drone melody)
> >    (ly:pitch? ly:music?)
> >    (map-some-music
> >     (lambda (m)
> >       (and (ly:pitch? (ly:music-property m 'pitch))
> >            (begin
> >             (set! (ly:music-property m 'pitch) drone)
> >             m)))
> >     melody)
> >    melody)
> >
> > melody = \relative f' {
> >   c4 r c8 d8 r4
> >   g2 r4 b4
> > }
> >
> > <<
> >   \melody
> >   \dronify g' \melody
> >   \dronify g \melody
> > > >
>
> Intersting. I have never tried to generate midi output for bagpipe
> music. I suspect grace notes are not handled well.

Not worse than in another kind of music. ;-)

> But in regards to
> the dronification, all of the music, both melody and drone, should be
> played legato.

Indeed.
The solution devised by Paul works fine (Thanks!) except for
that aspect.  With the "manual" drone, one writes ties between
the notes; is it possible to add it to the function?

> Is that also something that could be set up easily with
> a music function?
>
> I'm the maintainer of Lilypond's bagpipe mode, by the way.

Would you consider making "\dronify" part of a toolkit?
Personally, I don't use LilyPond's bagpipe mode, as it
seems completely biased towards the Scottish pipe. There
are many other kinds! :-)
Wouldn't it be interesting to separate what is generally
valid for all bagpipes (or, actually, continuous sound
music) from what is specific to a given tradition (e.g.
the naming of the ornaments)?

Best,
Gilles