diff --git a/light9/web/timeline/Note.coffee b/light9/web/timeline/Note.coffee
--- a/light9/web/timeline/Note.coffee
+++ b/light9/web/timeline/Note.coffee
@@ -31,6 +31,7 @@ class Note
     originTime = @graph.floatValue(subj, U(':originTime'))
 
     for curve in @graph.objects(subj, U(':curve'))
+      # todo: maybe shoudl be :effectAttr?
       if @graph.uriValue(curve, U(':attr')).equals(curveAttr)
         return @project.getCurvePoints(curve, originTime)
     throw new Error("curve #{@uri.value} has no attr #{curveAttr.value}")
diff --git a/light9/web/timeline/Project.coffee b/light9/web/timeline/Project.coffee
--- a/light9/web/timeline/Project.coffee
+++ b/light9/web/timeline/Project.coffee
@@ -52,6 +52,7 @@ class Project
         quad(newNote, U(':effectClass'), effect)
         quad(newNote, U(':curve'), newCurve)
         quad(newCurve, U('rdf:type'), U(':Curve'))
+        # todo: maybe shoudl be :effectAttr?
         quad(newCurve, U(':attr'), U(':strength'))
       ]