diff --git a/doc/devel/uml/fig144005.png b/doc/devel/uml/fig144005.png
index 93627a5ac..6ca73fc49 100644
Binary files a/doc/devel/uml/fig144005.png and b/doc/devel/uml/fig144005.png differ
diff --git a/uml/lumiera/133637 b/uml/lumiera/133637
index d788a91a9..6336ed674 100644
--- a/uml/lumiera/133637
+++ b/uml/lumiera/133637
@@ -1,6 +1,6 @@
 format 58
 "Play" // ProcessingLayer::Play
-  revision 1
+  revision 2
   modified_by 5 "hiv"
   // class settings
   //class diagram settings
@@ -273,7 +273,7 @@ ${inlines}
         end
     end
 
-    classinstance 146181 "video"
+    classinstance 146181 "video-L"
       type class_ref 176901 // CalcStream
       attributes
         end
@@ -281,7 +281,7 @@ ${inlines}
         end
     end
 
-    classinstance 146309 "video"
+    classinstance 146309 "video-R"
       type class_ref 176901 // CalcStream
       attributes
         end
@@ -305,7 +305,15 @@ ${inlines}
         end
     end
 
-    classinstance 146693 "sound-Z"
+    classinstance 146693 "sound-Y"
+      type class_ref 176901 // CalcStream
+      attributes
+        end
+      relations
+        end
+    end
+
+    classinstance 148357 "sound-Z"
       type class_ref 176901 // CalcStream
       attributes
         end
diff --git a/uml/lumiera/144005.diagram b/uml/lumiera/144005.diagram
index 42a499609..8a28bdf33 100644
--- a/uml/lumiera/144005.diagram
+++ b/uml/lumiera/144005.diagram
@@ -12,10 +12,10 @@ end
 classinstancecanvas 128389 classinstance_ref 146053 // 
   xyz 171 240 2000
 end
-classinstancecanvas 128517 classinstance_ref 146181 // video
+classinstancecanvas 128517 classinstance_ref 146181 // video-L
   xyz 233 194 2000 color lightgreen
 end
-classinstancecanvas 128645 classinstance_ref 146309 // video
+classinstancecanvas 128645 classinstance_ref 146309 // video-R
   xyz 233 216 2000 color lightgreen
 end
 classinstancecanvas 128773 classinstance_ref 146437 // sound-W
@@ -24,12 +24,9 @@ end
 classinstancecanvas 128901 classinstance_ref 146565 // sound-X
   xyz 233 291 2000 color lightgreen
 end
-classinstancecanvas 129029 classinstance_ref 146693 // sound-Z
+classinstancecanvas 129029 classinstance_ref 146693 // sound-Y
   xyz 233 313 2000 color lightgreen
 end
-classinstancecanvas 129157 classinstance_ref 146693 // sound-Z
-  xyz 233 335 2000 color lightgreen
-end
 classinstancecanvas 132101 classinstance_ref 146821 // 
   xyz 420 269 2000 color lightblue
 end
@@ -46,6 +43,9 @@ end
 classinstancecanvas 132741 classinstance_ref 147205 // 
   xyz 233 46 2000
 end
+classinstancecanvas 132869 classinstance_ref 148357 // sound-Z
+  xyz 233 335 2000 color lightgreen
+end
 objectlinkcanvas 129285 norel
   geometry VH
   from ref 128133 z 1999 to point 139 181
@@ -81,14 +81,14 @@ objectlinkcanvas 130949 norel
   from ref 128389 z 1999 to point 194 321
   line 131077 z 1999 to ref 129029
   no_role_a no_role_b
-objectlinkcanvas 131205 norel
-  geometry VH
-  from ref 128389 z 1999 to point 194 343
-  line 131333 z 1999 to ref 129157
-  no_role_a no_role_b
 objectlinkcanvas 131845 norel
   geometry VH
   from ref 128005 z 1999 to point 68 150
   line 131973 z 1999 to ref 128133
   no_role_a no_role_b
+objectlinkcanvas 132997 norel
+  geometry VHr
+  from ref 132869 z 1999 to point 194 343
+  line 133253 z 1999 to ref 128389
+  no_role_a no_role_b
 end