5 texidoc = "Concave beams should be horizontal. Informally spoken,
6 concave refers to the shape of the notes that are opposite a
7 beam. If an up-beam has high notes on its center stems, then we call
8 it concave. This example shows borderline cases. Only the beams
9 that are marked `horiz' should be printed horizontally. "
17 it is that makes a beam concave is still unclear.
19 Beams 1 and 3 should be sloped, 2 and 4 should be horizontal. Two
20 sane attempts of calculating concaveness of a beam fail to distinguish
28 %% This case seems easy: second beam should be horizontal.
30 %% SCS-I Menuet I, m15
39 %% SCS-I Menuet II, m20
44 fis,^"horiz." a c es d c
46 %%% Sarabande: the first beam, obviously more concave, is not horizontal,
47 %%% but is matched with the next beam in the piece: context.
57 %% concaveness:a: 0.12
60 % Hmm. Concaveness of both: 1.75
61 % %% SCS-VI Prelude, m81
67 % %% SCS-VI Prelude, m82
68 % %% slope = 0.1ss (possibly b.o. context?)
72 %%% Han-Wen: this should be concave
74 a,16[^"horiz." a' a a]
77 %%%% This should not be concave (hwn)
78 \stemUp bes8[ \stemDown d'8 bes8]
83 f16[^"horiz" b dis b f b]
88 this beam is horiz. in baerenreiter, but it is not really concave IMO.
105 %% LilyPond-indent-level:2