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Re: Non-numeric time signatures

From: Simon Albrecht
Subject: Re: Non-numeric time signatures
Date: Sat, 25 Oct 2014 23:59:52 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Thunderbird/31.2.0

Hello Dan,

I think the double c and double cut c symbols are very much non-standard, unlike single cut c for 4/2, which I consider to be in use very widely. With this difference in frequency of use I don’t find your suggestion convincing. What made me suggest the 'style option is the strong analogy to numeric and default style in 4/4 and 2/2 times. I would even vote for the following behaviour of 'style:

default: (currently called #'C – perhaps rename to #'symbolic? That would be more descriptive)
4/4 -> c
2/2 -> cut c
4/2 -> (single) cut c

#'numeric (behaviour should be obvious)

This is a very convincing system in my eyes. Another variant would be:

default (#'C)
4/4 -> c
2/2 -> cut c
4/2 -> 4/2


4/4 -> c
2/2 -> cut c
4/2 -> (single) cut c

How might an additional option for double c/cut c time signatures be called? Perhaps #'romantic or #'double or #'varsymbol?

So far my suggestions.
Yours, Simon

Am 25.10.2014 um 20:15 schrieb Dan Eble:
Simon (and all),

Regarding the request to display 4/2 as cut-c by default,

I think it would make sense to extend the default style to offer a simple way 
to get the doubled symbols:
     2/1 -> double cut-c (Schubert op. 90 no. 3)
     4/2 -> double c (my obscure hymnal)

You mentioned that you would be satisfied if there were a different style for 
your alla breve case.  Do you really need a style or is the following good 

timeAllaBreve = {
   \once \override Staff.TimeSignature.stencil =
   #(lambda (grob)
      (grob-interpret-markup grob
       #{ \markup \musicglyph #"timesig.C22" #}))
   \time 2/1

Another thing that occurs to me is a possible parallel with non-numeric tempo.  
When the single cut-c symbol is used to indicate 2/1, does it need to be 
annotated with text?  If so, would something like \time “alla breve” 2/1 be any 
better than the way it has to be done now?

Another potential use for that is \time “swing” 4/4.


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