diff --git a/MusicBoxConverter/MusicBox.cs b/MusicBoxConverter/MusicBox.cs
index b2e6536..f02d2bc 100644
--- a/MusicBoxConverter/MusicBox.cs
+++ b/MusicBoxConverter/MusicBox.cs
@@ -22,6 +22,12 @@ namespace MusicBoxConverter
 			}
 		}
 
+		public int NoteCount {
+			get {
+				return ValidNotes.Count;
+			}
+		}
+
 		private MusicBox(string inName, List<string> inValidNotes)
 		{
             Name = inName;
@@ -41,6 +47,11 @@ namespace MusicBoxConverter
             );
 		}
 
+		public int NoteToBoxNumber(Note note)
+		{
+			return ValidNotes.FindIndex((string playableNote) => $"{note.NoteName}{note.Octave}".Replace("Sharp", "#") == playableNote);
+		}
+
         public override string ToString()
         {
             return Name;
diff --git a/MusicBoxConverter/MusicBoxScoreGenerator.cs b/MusicBoxConverter/MusicBoxScoreGenerator.cs
index 781b40a..ff871d8 100644
--- a/MusicBoxConverter/MusicBoxScoreGenerator.cs
+++ b/MusicBoxConverter/MusicBoxScoreGenerator.cs
@@ -54,7 +54,7 @@ namespace MusicBoxConverter
 
 		public void Output(string destinationFilename)
 		{
-            Vector2 area = new Vector2(TrackLength, MaxNoteNumber - MinNoteNumber).Multiply(scaleFactor);
+			Vector2 area = new Vector2(TrackLength, MusicBox.NoteCount).Multiply(scaleFactor);
 			Vector2 size = area.Add(offset.Multiply(2)).Add(new Vector2(100000, 1000));
 
 			SvgWriter svg = new SvgWriter(destinationFilename, size.X.ToString(), size.Y.ToString());
@@ -71,7 +71,7 @@ namespace MusicBoxConverter
 				svg.WriteCircle(
 					new Vector2(
 						offset.X + note.Time * scaleFactor.X,
-						offset.Y + ((127 - note.NoteNumber) - (127 - MaxNoteNumber)) * scaleFactor.Y
+						offset.Y + (MusicBox.NoteCount - MusicBox.NoteToBoxNumber(note)) * scaleFactor.Y
 					),
 					holeSize // radius
 				);