Re: \tagsOn, \tagsOff

[Erik Sandberg]

On Friday 18 August 2006 22:39, Kieren MacMillan wrote:
> [ v2.9.14 ]
>
> Hello, all --
>
> No, this isn't Karate Kid 5!  ;-)
>
> This is a continuation of the thread "setting up a very complex
> choral layout", with a possible feature request...

I have a different suggestion which might solve your problem to some degree: 
You can split up music into short segments, and then align lyrics to a 
devnull context which you compose from those short segments. IIRC we 
discussed this on lily-user some time ago, search for devnull and lyricsto.

> I think we could solve all my multi-output issues -- and add a really
> powerful tool to the Lilypond kit -- if we had a \tagsOn (and maybe
> \tagsOff?) trigger, which would tell Score to listen (or not) to a
> given tag.

I don't think your suggestion would work well with the current incarnation of 
\tag, because it's based on operations on music expressions. 

However, I think this can be an application of the new music stream 
architecture: We could add a layer of listeners between front-end and 
back-end, which filter out all events with specific tags; \tagsOn/Off would 
change those filters in interpretation-time.

-- 
Erik