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

[Gilles Thibault]

> 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...)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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
> >
}

\score { \new DrumStaff {
                   \set Staff.instrumentName = #"drums"
                   \grooveFinal }
\layout { \override NoteColumn.ignore-collision = ##t }
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


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 }
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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

--
Gilles