Slur placement for SATB

[nbruley]

Slur placement is not consistent (v6.4.3)

X:1
T:Knecht
T:7.6.7.6
C:Justin Heinrich Knecht(1791)
L:1/8
M:4/4
Q:1/4=100
K:D
%%score (S A) (T B)
V:S clef=treble middle=B stem=up
V:A clef=treble middle=B stem=down
V:T clef=bass,, stem=up
V:B clef=bass,, stem=down
[V:S]D2|D2 (CD) E2 E2| E2 D4||
F2|F2 (EF) G2 E2|C6||
D2|D2 E2 E2 F2|G2 B4||
B2|A2 F2 E2 E2|D6|]
[V:A]A,2|A,2 (A,A,) C2 C2| C2 A,4||
D2|D2 (C=C) B,2 B,2|A,6||
A,2|A,2 C2 C2 =C2|B,2 D4||
G2|F2 D2 C2 C2|A,6|]
[V:T]F,2|F,2(F,F,)A,2G,2|G,2F,4||
A,2|A,2(G,A,)G,2G,2|G,6||
F,2|F,2A,2G,2A,2|G,2G,4||
G,2|A,2A,2A,2G,2|F,6|]
[V:B]D,2|D,2(D,D,)A,,2A,,2|A,,2D,4||
D,2|D,2(A,,A,,)G,,2G,,2|A,,6||
D,2|D,2A,,2A,,2D,2|G,,2G,,4||
G,,2|D,2D,2A,,2A,,2|D,6|]```

[seisiuneer]

nbruley, can you be more specific about what isn't consistent? I'm not seeing it.

[nbruley]

Yellow is outside the beam, blue is inside.

[seisiuneer]

Thanks! I see it now.

[seisiuneer]

Interestingly, if you don't group the voices, I think it may consistent:

X:1
T:Knecht
T:7.6.7.6
C:Justin Heinrich Knecht(1791)
L:1/8
M:4/4
Q:1/4=100
K:D
%%stretchlast true
%%score S A T B
V:S clef=treble middle=B stem=up
V:A clef=treble middle=B stem=down
V:T clef=bass,, stem=up
V:B clef=bass,, stem=down
[V:S]D2|D2 (CD) E2 E2| E2 D4||
F2|F2 (EF) G2 E2|C6||
D2|D2 E2 E2 F2|G2 B4||
B2|A2 F2 E2 E2|D6|]
[V:A]A,2|A,2 (A,A,) C2 C2| C2 A,4||
D2|D2 (C=C) B,2 B,2|A,6||
A,2|A,2 C2 C2 =C2|B,2 D4||
G2|F2 D2 C2 C2|A,6|]
[V:T]F,2|F,2(F,F,)A,2G,2|G,2F,4||
A,2|A,2(G,A,)G,2G,2|G,6||
F,2|F,2A,2G,2A,2|G,2G,4||
G,2|A,2A,2A,2G,2|F,6|]
[V:B]D,2|D,2(D,D,)A,,2A,,2|A,,2D,4||
D,2|D,2(A,,A,,)G,,2G,,2|A,,6||
D,2|D,2A,,2A,,2D,2|G,,2G,,4||
G,,2|D,2D,2A,,2A,,2|D,6|]

I'm going to keep messing with this to see if can provide any more insight.

[seisiuneer]

If you take away the specific stem directions, you get this, which seems consistent while still providing proper stem directions:

X:1
T:Knecht
T:7.6.7.6
C:Justin Heinrich Knecht(1791)
L:1/8
M:4/4
Q:1/4=100
K:D
%%stretchlast true
%%score (S A) (T B)
V:S clef=treble middle=B
V:A clef=treble middle=B
V:T clef=bass,,
V:B clef=bass,,
[V:S]D2|D2 (CD) E2 E2| E2 D4||
F2|F2 (EF) G2 E2|C6||
D2|D2 E2 E2 F2|G2 B4||
B2|A2 F2 E2 E2|D6|]
[V:A]A,2|A,2 (A,A,) C2 C2| C2 A,4||
D2|D2 (C=C) B,2 B,2|A,6||
A,2|A,2 C2 C2 =C2|B,2 D4||
G2|F2 D2 C2 C2|A,6|]
[V:T]F,2|F,2(F,F,)A,2G,2|G,2F,4||
A,2|A,2(G,A,)G,2G,2|G,6||
F,2|F,2A,2G,2A,2|G,2G,4||
G,2|A,2A,2A,2G,2|F,6|]
[V:B]D,2|D,2(D,D,)A,,2A,,2|A,,2D,4||
D,2|D,2(A,,A,,)G,,2G,,2|A,,6||
D,2|D,2A,,2A,,2D,2|G,,2G,,4||
G,,2|D,2D,2A,,2A,,2|D,6|]

[nbruley]

I'm just assuming that the slur should go outside of the beams, but I am not clear on the rules for this. Paul said it is complex, #988

[paulrosen]

I'm in the process of reworking this area. The technical reason is the order that things are calculated. If a note is not beamed I know immediately how tall it is. If it is beamed then I don't know until after some other things are placed. I need to change the order of some of this, but it is difficult because of the way the code is currently structured. Also, for no good reason, the space above and the space below are handled a little differently.

Another thing is in the fifth measure the bass staff should have been placed lower - that is the bug I just fixed but I guess there is another case.

[nbruley]

I must have used an old screen shot. The spacing may be OK.