Re: Several thoughts for implementing accordion standard bass support

[Han-Wen Nienhuys]

On Tue, Jan 19, 2010 at 11:55 AM, David Kastrup <address@hidden> wrote:

>>> StdbassEngraver = #`((listeners
>>>                       (note-event .
>>>                        ,(lambda (engraver event)
>>>                          (let* ((pitch (ly:event-property event 'pitch)))
>>>                           (ly:event-set-property! event 'pitch
>>
>> This looks wrong - engravers should not modify their inputs. Rather,
>> the engraver should create the Grob that you are interested in, or it
>> should acknowledge the grob created by another engraver.
>
> Obviously, I have no clue whatsoever about what I am doing, and this is
> the "poke with a stick until it works(TM)" approach.
>
> Could you give a code example or outline for either of the possibilities
> that you outlined?

I am completely unsure what you are trying to achieve.  Are you really
trying to typeset noteheads on a staff, or is it something else?

-- 
Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen