Pavel Roskin <pro...@gnu.org> writes:
> I also saw this request in forum and mailing posts. They mention two
> workarounds - use \partial and hide bars or use \grace with a hidden
> note in all staves.
Grace with spacer rest possibly.
> I consider both unacceptable hacks that would affect the MIDI output and
> require changes to all staves. Lilypond input should be readable and
> durable, and adding extra notes to all staves looks like an obfuscation
> to me. Hacks tend to break and scare away potential contributors.
>
> I believe Lilypond should be made smart enough to understand this:
>
> \version "2.15.23"
> \score {
> <<
> \new Staff <<
> \context Voice = "melody" { \clef treble \clef bass c1 }
> >>
> >>
> \layout {}
> }
>
> As it stands now, the treble key is eliminated. If the user cares to
> write "\clef treble \clef bass", why should the user input be ignored
> and the first clef eliminated?
Because you can't set more than one clef at a given time step. Clefs
are set by changing properties. If those indicate a change of clef, an
appropriately changed clef is typeset.
Property changes are done by property change events, those are put to
effect by a suitable engraver early in the order, before the clef
engraver runs.
> At least there should be an option to suppress such annoying
> optimization.
It is not an optimization.
--
David Kastrup
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