diff --git a/MusicBoxConverter/Program.cs b/MusicBoxConverter/Program.cs
index 2fdaacc..1aee63a 100644
--- a/MusicBoxConverter/Program.cs
+++ b/MusicBoxConverter/Program.cs
@@ -17,8 +17,8 @@ namespace MusicBoxConverter
 			string outputFilename = "";
 			bool debug = false;
 			MusicBox targetMusicBox = MusicBox.Note30Corrected;
-			float scaleFactorX = 0.03f;
-			float scaleFactorY = 4.0f;
+			float scaleFactorX = -1f;
+			float scaleFactorY = -1f;
 
 			for(int i = 0; i < args.Length; i++)
 			{
@@ -91,8 +91,10 @@ namespace MusicBoxConverter
 				Debug = debug
 			};
 			
-			converter.SetScaleFactorX(scaleFactorX);
-			converter.SetScaleFactorY(scaleFactorY);
+			if(scaleFactorX > 0)
+				converter.SetScaleFactorX(scaleFactorX);
+			if(scaleFactorY > 0)
+				converter.SetScaleFactorY(scaleFactorY);
 			converter.Output(outputFilename);
 
 			return 0;