The 2 most annoying bugs are segfaults, infinite loops, and *off-by-one* errors.

MusicBoxConverter/MusicBox.cs

@@ -11,7 +11,7 @@ namespace MusicBoxConverter
 		/// <summary>
 		/// The height of a strip for this music box, in millimetres.
 		/// </summary>
-		public float StripHeightMm = 58f;
+		public float StripHeightMm = 58.8f;
 		public List<string> ValidNotes { get; private set; }
 
 		public Note LowestNote {

MusicBoxConverter/MusicBoxScoreGenerator.cs

@@ -49,7 +49,7 @@ namespace MusicBoxConverter
 			// Set the scale factor based on the strip height of the music box
 			scaleFactor = new Vector2(
 				scaleFactor.X,
-				MusicBox.StripHeightMm / MusicBox.NoteCount
+				MusicBox.StripHeightMm / (MusicBox.NoteCount-1)
 			);
 
             foreach(Note note in AllNotes()) {
@@ -60,7 +60,7 @@ namespace MusicBoxConverter
 
 		public void Output(string destinationFilename)
 		{
-			Vector2 area = new Vector2(TrackLength, MusicBox.NoteCount).Multiply(scaleFactor);
+			Vector2 area = new Vector2(TrackLength, MusicBox.NoteCount-1).Multiply(scaleFactor);
 			Vector2 size = area.Add(offset.Multiply(2));
 
 			SvgWriter svg = new SvgWriter(
@@ -72,10 +72,10 @@ namespace MusicBoxConverter
 			for(float i = 0; i < area.Y; i += scaleFactor.Y)
 			{
 				Vector2 start = offset.Add(new Vector2(0, i));
-				svg.WriteLine(start, start.Add(new Vector2(area.X, 0)), "darkgreen", 1);
+				svg.WriteLine(start, start.Add(new Vector2(area.X, 0)), "darkgreen", 0.75f);
 			}
 
-			svg.WriteRectangle(offset, area);
+			svg.WriteRectangle(offset, area, "red", 0.75f);
 
 			foreach(Note note in AllNotes())
 			{
@@ -83,7 +83,7 @@ namespace MusicBoxConverter
 				svg.WriteCircle(
 					new Vector2(
 						offset.X + note.Time * scaleFactor.X,
-						offset.Y + (MusicBox.NoteCount - MusicBox.NoteToBoxNumber(note)) * scaleFactor.Y
+						offset.Y + ((MusicBox.NoteCount-1) - MusicBox.NoteToBoxNumber(note)) * scaleFactor.Y
 					),
 					holeSize // radius
 				);

MusicBoxConverter/Program.cs

@@ -9,8 +9,8 @@ namespace MusicBoxConverter
 		public static void Main(string[] args)
 		{
             MusicBoxScoreGenerator converter = new MusicBoxScoreGenerator(
-                "/home/sbrl/Music/Sheets/HappyBirthday.midi",
-				//"/tmp/Scale.midi",
+                //"/home/sbrl/Music/Sheets/HappyBirthday.midi",
+				"/tmp/Scale.midi",
 				MusicBox.Note30
 			);
 			converter.Output("/tmp/test.svg");

MusicBoxConverter/SvgWriter.cs

@@ -53,7 +53,7 @@ namespace MusicBoxConverter
 			xml.Close();
 		}
 
-		public void WriteLine(Vector2 start, Vector2 end, string strokeStyle = "darkgreen", int strokeWidth = 3)
+		public void WriteLine(Vector2 start, Vector2 end, string strokeStyle = "darkgreen", float strokeWidth = 3)
 		{
 			xml.WriteStartElement("line");
 			xml.WriteAttributeString("x1", $"{start.X}{UnitSuffix}");
@@ -85,7 +85,7 @@ namespace MusicBoxConverter
 			xml.WriteEndElement();
 		}*/
 
-		public void WriteRectangle(Vector2 position, Vector2 size, string strokeStyle = "red", int strokeWidth = 3)
+		public void WriteRectangle(Vector2 position, Vector2 size, string strokeStyle = "red", float strokeWidth = 3)
 		{
 			xml.WriteStartElement("rect");
 			xml.WriteAttributeString("x", $"{position.X}{UnitSuffix}");