Some changes to preview-start.

Vocaluxe/Base/CBackgroundMusic.cs

@@ -310,6 +310,19 @@ namespace Vocaluxe.Base
 
             _PlaysPreview = true;
             _PreviewPlayer.Load(song, start);
+
+            float startposition = song.Preview.StartTime;
+
+            float length = _PreviewPlayer.Length;
+
+            if (song.Preview.Source == EDataSource.None)
+                startposition = length / 4f;
+            else if (startposition > length - 5f)
+                startposition = Math.Max(0f, Math.Min(length / 4f, length - 5f));
+
+            _PreviewPlayer.Position = startposition;
+
+            Play();
         }
 
         public static void PlayPreview(float start = -1f)

VocaluxeLib/Menu/SongMenu/CSongMenuFramework.cs

@@ -507,17 +507,6 @@ namespace VocaluxeLib.Menu.SongMenu
                 return;
 
             CBase.BackgroundMusic.LoadPreview(song);
-
-            float startposition = song.Preview.StartTime;
-
-            float length = CBase.BackgroundMusic.GetLength();
-
-            if (song.Preview.Source == EDataSource.None)
-                startposition = length / 4f;
-            else if (startposition > length - 5f)
-                startposition = Math.Max(0f, Math.Min(length / 4f, length - 5f));
-
-            CBase.BackgroundMusic.PlayPreview(startposition);
         }
 
         protected void _ResetPreview()

VocaluxeLib/Songs/CSongLoader.cs

@@ -416,6 +416,7 @@ namespace VocaluxeLib.Songs
                     {
                         //PreviewStart is not set or <=0
                         _Song.Preview.StartTime = (headerFlags & EHeaderFlags.MedleyStartBeat) != 0 ? CBase.Game.GetTimeFromBeats(_Song.Medley.StartBeat, _Song.BPM) : 0f;
+                        _Song.Preview.Source = EDataSource.Calculated;
                     }
 
                     if ((headerFlags & EHeaderFlags.MedleyStartBeat) != 0 && (headerFlags & EHeaderFlags.MedleyEndBeat) != 0)