Re: Replace the notes in a phrase (drum notation) with scheme?

[Stefano Antonelli]

On Tue, 2020-04-28 at 20:53 +0200, Gilles Thibault wrote:
> > 
> > I appreciate the suggestion, but I don't think that helps.  I can
> > see
> > that you are replacing whole bars of music, which is kinda cool in
> > fact.  However, it doesn't help me with my goal which is to not
> > have to
> > define groovec at all.
> Yes ok. Below a solution replacing only one note, all 4 measures. No 
> groovec.
> Not perhaps the simplest solution however because you have to add 
> \repeat unfold 16
> in each voices. (Probably not what you whished...)

Thank you very much again for the suggestions.

> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> 
> A = \drummode { \voiceOne  \repeat unfold 8 hh8 }
> B = \drummode { \voiceOne { s4 sn4 s4 sn4 } }
> C = \drummode { \voiceTwo { bd8 bd8 r4 bd8 bd8 bd8 bd8 } }
> 
> 
> grooveFinal = \drummode { <<
>      \multiReplaceMusic \repeat unfold 16 \A
>          { cymc8 s1*0
>            cymc8 s1*4
>            cymc8 s1*8
>            cymc8 s1*12  }
>      \\
>      \repeat unfold 16 \B
>      \\
>      \repeat unfold 16 \C
> }

Indeed this is a bit verbose.  The problem is not with the definitions
of A, B, and C.  Those I could live with.  But the formation of
grooveFinal doesn't work for me.  Mainly because the repeat happens
elsewhere.

I combine all the drum phrases into a single variable that I'll include
in a score (and unfolded for midi in another score):

theMusic = \drummode {
        \leadin
        \dtMarkSection "Intro"
        \introc \repeat percent 3 {\intro}
        \dtMarkSection "Verse"
        \versec \repeat percent 5 {\verse}
        \dtMarkFill "Fill 1" \fillI |
}

\dtMarkxxxx are for formatted rehearsal marks. \leadin, \introc,
\intro, \versec, \verse, and \fillI would be defined like groove (ie.
polyphonic, up to 4 voices).

What I would like to do is remove \introc and \versec definitions and
instead have:

theMusic = \drummode {
        \leadin
        \dtMarkSection "Intro"
        \crashAtStart { \repeat percent 4 {\intro} }
        \dtMarkSection "Verse"
        \crashAtStart { \repeat percent 6 {\verse} }
        \dtMarkFill "Fill 1" \fillI |
}

where \crashAtStart can be defined in an include file for all projects.
 The important part here is that \crashAtStart be an "inline function"
for lack of a better word.

Solutions other than above probably won't be an improvement for me.

> This other solution use a very small groovec. Perhaps it will not
> work 
> in 2.18 (uses \voices). I think it is the lighter solution.
> 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> 
> A = \drummode { \repeat unfold 8 hh8 }
> B = \drummode {  s4 sn8 s s4 sn8 s  }  % <- little change here to
> avoid 
> notes collision
> C = \drummode {  bd8 bd8 r4 bd8 bd8 bd8 bd8 }
> 
> groovec = \drummode { \voices 1,1,2 << cymc8 \\ s8 \\  bd8  >> }
> 
> groove =  { \voices 1,1,2 << \A \\ \B \\ \C >> }
> 
> grooveFinal = \multiReplaceMusic \repeat unfold 16 \groove {
>                  \groovec s1*0
>                  \groovec s1*4
>                  \groovec s1*8
>                  \groovec s1*12 }
> 
> 
> \score { \new DrumStaff {
>                  \set Staff.instrumentName = #"drums"
>                  \grooveFinal }
> }
> 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

You're right this does not work in 2.18, but I'm not tied to 2.18
either.  Just too lazy to upgrade when everything currently works (or
has a working workaround).

Unfortunately, as explained above, this would be too verbose as well.

> Extended features are in preparation (in a few weeks ?). This will
> make 
> more easier to deal with simultaneous music. Not ready for now. Sorry

I'm not in a rush and thank you again for the help.  I'll gladly
revisit this topic when those extended features are ready.

Thanks,
Stef