Re: showing TimeSignatures on each line?

[Simon Albrecht]

Hi Evan,


On 29.08.2017 22:26, Evan Laforge wrote:
> In music where the time signature changes a lot, it's nice to show the
> time signature on each line even when it hasn't changed.

Are you sure? Who does that? I looked in the very finely engraved full 
score of Stravinsky’s Sacre, and Stravinsky and/or the engraver(s) 
didn’t find it necessary/desirable. If it’s unnecessary there, it should 
be unnecessary anywhere.

>    Is there a
> way to get that to happen?

There certainly is, but I don’t have a striking idea, or: it doesn’t 
seem there’s a simple way.

> I experimented with the (undocumented?)
> TimeSignature.break-visibility, but even with (#t #t #t) it doesn't
> seem to have any effect.

Many properties aren’t specifically documented for specific grobs. The 
IR [1] shows you that it’s already ##(#t #t #t). But break-visibility 
isn’t the right tool, since you are asking about inserting additional 
time signatures, not about hiding or showing the ones that are there.
Sorry I can’t come up with an actual solution right now.

Best, Simon

[1] <http://lilypond.org/doc/v2.19/Documentation/internals/timesignature>