{
   Track *t;
   Track *n;
   TrackListIterator iter( mTracks );
   bool tSelected,nSelected;

   t = GetFocusedTrack();   // Get currently focused track
   if( t == NULL )   // if there isn't one, focus on first
   {
      t = iter.First();
      SetFocusedTrack( t );
      EnsureVisible( t );
      return;
   }

   if( shift )
   {
      n = mTracks->GetNext( t, true ); // Get next track
      if( n == NULL )   // On last track so stay there
      {
         wxBell();
         if( mCircularTrackNavigation )
         {
            TrackListIterator iter( mTracks );
            n = iter.First();
         }
         else
         {
            EnsureVisible( t );
            wxLogDebug(wxT("On last track, %s"),t->GetName().c_str());
            return;
         }
      }
      tSelected = t->GetSelected();
      nSelected = n->GetSelected();
      if( tSelected & nSelected )
      {
         mTracks->Select( t, false );
         SetFocusedTrack( n );   // move focus to next track down
         EnsureVisible( n );
         return;
      }
      if( tSelected & !nSelected )
      {
         mTracks->Select( n, true );
         SetFocusedTrack( n );   // move focus to next track down
         EnsureVisible( n );
         return;
      }
      if( !tSelected & nSelected )
      {
         mTracks->Select( n, false );
         SetFocusedTrack( n );   // move focus to next track down
         EnsureVisible( n );
         return;
      }
      if( !tSelected & !nSelected )
      {
         mTracks->Select( t, true );
         SetFocusedTrack( n );   // move focus to next track down
         EnsureVisible( n );
         return;
      }
   }
   else
   {
      n = mTracks->GetNext( t, true ); // Get next track
      if( n == NULL )   // On last track so stay there
      {
         wxBell();
         if( mCircularTrackNavigation )
         {
            TrackListIterator iter( mTracks );
            n = iter.First();
            SetFocusedTrack( n );   // Wrap to the first track
            EnsureVisible( n );
            return;
         }
         else
         {
            EnsureVisible( t );
            return;
         }
      }
      else
      {
         SetFocusedTrack( n );   // move focus to next track down
         EnsureVisible( n );
         return;
      }
   }
}