Re: [Scheme coding] how to turn pitches into music

[Aaron Hill]

On 2020-01-25 11:15 am, Kieren MacMillan wrote:
> Hi again!
>
> Tried taking your advice, and building the custom context from
> scratch. The problem, of course, is that I don’t know all the
> engravers and what they do (a.k.a. why they’re needed)… and the
> documentation doesn’t exactly make everything crystal clear in that
> regard.

If you permit me to be honest: I would not have the foggiest idea 
either.  (:


> But clearly that doesn’t Do The Right Thing™. Any guidance would be 
> appreciated.

The Internals Reference does list which engravers produce which grobs, 
and there is always the source code itself.  The problem though is 
knowing what you are looking for.  This is especially tricky when you 
have normally invisible grobs, since their very existence is a mystery 
before pulling back the curtain.

LSR 280 [1] might be handy too.  In fact, it shows that a number of 
relevant engravers are in the Voice, not the Staff by default.  This 
suggests we might need both a custom RowReducedStaff and RowReducedVoice 
to reach the goal.

[1]: http://lsr.di.unimi.it/LSR/Item?id=280


-- Aaron Hill