Position of dots in mensural ligatures

[Malte Meyn]

Hi list,

according to Willi Apel in “The Notation of Polyphonic Music, 900–1600” 
augmentation dots in ligatures should be placed above, not right of the 
note the augment except if it’s the last note of the ligature.

See attached picture, it translates to “Every note within a ligature can 
be dotted. If the note in question stands at the beginning or center, 
the dot is printed above it, f. e.: [picture of three ligatures]”

Here is the third example in LilyPond code; as you can see in the second 
attached picture, LilyPond places the dot right instead of above.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\version "2.19.80"

\new Voice \with {
  \remove Ligature_bracket_engraver
  \consists Mensural_ligature_engraver
} \relative {
  \cadenzaOn
  \[ c''1 b g\breve. b\breve \]
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

I’m not sure if Apel is 100% correct for all cases; does anyone know 
other sources?

Cheers,
Malte

apel_ligature_dots.png
Description: PNG image

lilypond_ligature_dots.png
Description: PNG image