Re: drum notes in parentheses?

[Rune Zedeler]

Han-Wen Nienhuys wrote:

> > I cannot understand what happens - the drum scheme functions do not 
> > change the 'molecule-callback ...
>
>
> No, but they change the NoteHead definition at Thread level,
> overriding the molecule-callback setting at Voice level. I think
> make-head-type-elem should insert an \outputproperty instead, as it
> does something different per note head. Also, it seems that the
> current code keeps extending the NoteHead definition, without every
> reverting anything.

WHOOPS! You are right.
No wonder that I ran into so many guile-related bugs with my 
søndag-morgen exams, then!!!
I replaced the override with a set, and that's that. The drum code 
should still be considered temporary and I don't really feel like making 
big changes in it.

> Final option: make a
> separate drum-head-engraver and drum-head-performer and postpone the
> translation to the interpretation stage. Advantages: this is cleaner,
> and you don't need a separate MIDI block to get the instrumentation
> right.

Yes, this has been on my todo-list for a long time. You surely remember 
the very longish letter I wrote about this subject, ages ago.

-Rune