More documentation!

elements/core/doc.go

@@ -2,6 +2,6 @@
 // interfaces without having to duplicate a ton of code. Each "core" is a type
 // that can be embedded into an element directly, working to fulfill a
 // particular interface. Each one comes with a corresponding core control, which
-// provides an interface for elements to exert control over the core. They
-// should be kept private.
+// provides an interface for elements to exert control over the core. Core
+// controls should be kept private.
 package core

elements/fun/music/doc.go

@@ -0,0 +1,4 @@
+// Package music provides types relating to music theory and the math behind it.
+// It is used in the fun.Piano element, and in the piano example to generate
+// pitches from notes.
+package music

elements/fun/music/music.go

@@ -43,6 +43,7 @@ const (
 	NoteBb0
 	NoteB0
 
+	// nice
 	NoteA4 Note = 69
 )