Fix issue 1601 -- poor autobeam settings for 6/8, 9/8, 12/8

Added regtest that shows all of the default autobeam settings

diff --git a/input/regression/autobeam-show-defaults.ly b/input/regression/autobeam-show-defaults.ly
new file mode 100644 (file)
index 0000000..8b0a427
--- /dev/null
+++ b/input/regression/autobeam-show-defaults.ly
@@ -0,0 +1,144 @@
+\version "2.13.59"
+
+\header {
+
+  texidoc = "
+Default autobeam settings have been set for a number of time signatures.
+Each score shows the desired beaming
+"
+
+}
+
+{
+  \time 2/2
+  a8^\markup "Beams should end at 4/8, 6/8, and 8/8"
+  \repeat unfold 6 a8 a16 a32 a64 a128 a
+}
+{
+  \time 2/4
+  a8^\markup "Beams should end at 2/8 and 4/8"
+  \repeat unfold 6 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 2/8
+  a8^\markup "Beams should end at 1/8 and 2/8"
+  \repeat unfold 2 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 2/16
+  a16^\markup "Beams should end at 1/16 and 2/16"
+  a a a32 a64 a128 a
+}
+{
+  \time 3/2
+  a8^\markup "Beams should end at 4/8, 8/8, 10/8 and 12/8"
+  \repeat unfold 10 a8 a16 a32 a64 a128 a }
+{
+  \time 3/4
+  a8^\markup "1/8 beams should end at 3/4; smaller beams should end at 1/4, 2/4, and 3/4"
+  \repeat unfold 5 a8
+  \repeat unfold 11 a16 a32 a64 a128 a
+}
+{
+  \time 3/8
+  a8^\markup "Beams should end at 3/8"
+  a a
+  \repeat unfold 5 a16 a32 a64 a128 a
+}
+{
+  \time 3/16
+  a16^\markup "Beams should end at 1/16, 2/16, and 3/16"
+  \repeat unfold 4 a16
+  a32 a64 a128 a
+}
+{
+  \time 4/2
+  a8^\markup "Beams should end at 4/8, 8/8, 12/8, 14/8, and 16/8"
+  \repeat unfold 14 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 4/4
+  a8^\markup "Beams should end at 4/8, 6/8, and 8/8"
+  \repeat unfold 6 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 4/16
+  a8^\markup "Beams should end at 1/16, 2/16, 3/16, and 4/16"
+  a \repeat unfold 7 a16
+  a32 a64 a128 a
+}
+{
+  \time 4/8
+  a8^\markup "Beams should end at 2/8 and 4/8"
+  \repeat unfold 6 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 6/4
+  a8^\markup "Beams should end at 6/8, 8/8, 10/8, and 12/8"
+  \repeat unfold 10 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 6/8
+  a8^\markup "Beams should end at 3/8 and 6/8"
+  \repeat unfold 10 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 9/4
+  a8^\markup "Beams should end at 6/8, 12/8, 14/8, 16/8, and 18/8"
+  \repeat unfold 16
+  a8 a16 a32 a64 a128 a
+}
+{
+  \time 9/8
+  a8^\markup "Beams should end at 3/8, 6/8, and 9/8"
+  \repeat unfold 7 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 9/16
+  a8^\markup "Beams should end at 3/16, 6/16, and 9/16"
+  \repeat unfold 3 a8
+  \repeat unfold 9 a16
+  a32 a64 a128 a
+}
+{
+  \time 12/4
+  a8^\markup "Beams should end at 6/8, 12/8, 18/8, 20/8, 22/8, and 24/8"
+  \repeat unfold 22 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 12/8
+  a8^\markup "Beams should end at 3/8, 6/8, 9/8, and 12/8"
+  \repeat unfold 22 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 12/16
+  a8^\markup
+    \column {
+      "1/8 beams should end at 6/16 and 12/16"
+      "Shorter beams should end at 3/16, 6/16, 9/16, and 12/16"
+    }
+  \repeat unfold 5 a8
+  \repeat unfold 11 a16
+  a32 a64 a128 a
+}
+{ \time 5/8
+  a8^\markup "Beams should end at 3/8 and 5/8"
+  \repeat unfold 8 a8
+  a16 a32 a64 a128 a
+}
+{
+  \time 8/8
+  a8^\markup "Beams should end at 3/8, 6/8, and 8/8"
+  \repeat unfold 14 a8 a
+  16 a32 a64 a128 a
+}

diff --git a/scm/time-signature-settings.scm b/scm/time-signature-settings.scm
index 0c49d585eab456e8fc59772166466407a35803d1..590ed7e7029d3fa769ef6deb9cb5fba380bc20d9 100644 (file)
--- a/scm/time-signature-settings.scm
+++ b/scm/time-signature-settings.scm
@@ -125,12 +125,10 @@
              ((beamExceptions . ((end .  (((1 . 16) . (4 4 4 4 4 4))))))))
 
     ;; in 6 8 time:
-    ;;   use defaults, but end beams with 32nd or finer each 1 8 beat
-    ((6 . 8) .
-             ((beamExceptions . ((end .  (((1 . 32) . (4 4 4 4 4 4))))))))
+    ;;   use defaults, so no entries necessary
 
     ;; in 6 16 time:
-    ;;   use defaults, so no entry necessary
+    ;;   use defaults, so no entries necessary
 
     ;; in 9 4 time:
     ;;   use defaults, but end beams with 32nd or finer each 1 4 beat
@@ -138,9 +136,7 @@
              ((beamExceptions . ((end . (((1 . 32) . (8 8 8 8 8 8 8 8))))))))
 
     ;; in 9 8 time
-    ;;   use defaults, but end beams with 32nd notes each 1 8 beat
-    ((9 . 8) .
-             ((beamExceptions . ((end . (((1 . 32) . (4 4 4 4 4 4 4 4 4))))))))
+    ;;   use defaults, so no entries necessary
 
     ;; in 9 16 time
     ;;   use defaults, so no entry necessary
@@ -151,9 +147,7 @@
               ((beamExceptions . ((end . (((1 . 32) . (8 8 8 8 8 8 8 8 8 8 8 8))))))))
 
     ;; in 12 8 time:
-    ;;   use defaults, but end beams with 32nd notes each 1 8 beat
-    ((12 . 8) .
-              ((beamExceptions . ((end . (((1 . 32) . (4 4 4 4 4 4 4 4 4 4 4 4))))))))
+    ;;   use defaults, so no entries necessary
 
     ;; in 12 16 time:
     ;;   use defaults; no entry needed