Lack of clarity over mensural time signatures

[Han-Wen Nienhuys]

Hi,

the manual section on ancient notation was contributed by Jurgen
Reuter.  I don't know anything about ancient notation, so I should be
grateful if you would research further, and propose an alternative
text.

Thanks!

address@hidden writes:
> In the manual, under "Ancient time signatures" it says
> 
> "Some glyphs (such as the alternate glyph for 6/8 meter) are not at all
> accessible through the \time command."
> 
> In the table above, a glyph is shown above the command "\time 6/8".
> AFAICS, no other 6/8 glyph is mentioned in the manual. Are there two
> glyphs, one you get with \time 6/8, and one you get some other way (which
> seems not to be mentioned)? Or is the sentence I just quoted wrong?
> 
> The manual continues:
> 
> "Mensural time signatures are supported typographically, but not yet
> musically. The internal representation of durations is based on a purely
> binary system; a ternary division such as 1 brevis = 3 semibrevis (tempus
> perfectum) or 1 semibrevis = 3 minima (cum prolatione maiori) is not
> correctly handled: event times in ternary modes will be badly computed,
> resulting e.g. in horizontally misaligned note heads, and bar checks are
> likely to erroneously fail."
> 
> But again, I can't see any way to get \time (or another command) to select
> a ternary time signature.
> 
> -- 
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> 
> 
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-- 

 Han-Wen Nienhuys   |   address@hidden   |   http://www.xs4all.nl/~hanwen