private void Player_PositionChanged(AudioPlayer sender, PositionChangeEventArgs args)
 {
     if (args.IsUserChange)
     {
         SinglePreview.Reposition(args.Position);
         MultilinePreview.Reposition(args.Position);
     }
     else
     {
         SinglePreview.RefreshLyric(args.Position);
         MultilinePreview.RefreshLyric(args.Position);
     }
 }