How to set up polymetric situations

[Simon Albrecht]

On 21.07.2018 09:08, David Kastrup wrote:
> > It’s also sensible as well as intuitive and mnemonic to address the
> > Timing alias here:
> >
> > \set Timing.tempoHideNote = ##t
> Only if you move the Metronome_mark_engraver in polyrhythmic situations.
> If you don't and Timing is at Staff level...  The Midi is also affected
> at Score level.

This got me thinking – the only reason not to move 
Metronome_mark_engraver is laziness or forgetting to do so. What if we 
provided a context mod identifier that performs all the necessary 
actions for setting up per-Staff timing/meters using just one command?

I’ve attached a proof of concept, which works fine in this example, but 
as we very recently discussed, it’s not a good idea to put a whole 
output definition inside another \layout{} block. However, I don’t know 
of any other way to wrap modifications to both Score and Staff contexts 
into a single variable…

Best, Simon

TimingToStaff-Proof-of-concept.ly
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