bool TestSoundApp::KeyPressed(const dtCore::Keyboard* keyboard, int key)
  {
     // pass the keyboard event to the overlords
     bool handled = Application::KeyPressed(keyboard, key);
     if (handled)  
 == true


     {
        return handled;
     }
  
     // do something depending on which key was pressed
     switch (key)
     {
     case osgGA::GUIEventAdapter::KEY_Space:
        {
           // get a new sound from the manager
           Sound* sound = AudioManager::GetInstance().NewSound();
           assert(sound);
  
           // load the sound file into our sound
           sound->LoadFile(kSoundFile2);
  
           // set the callbacks for our sound
           sound->SetPlayCallback(SoundStartedCB, this);
           sound->SetStopCallback(SoundStoppedCB, this);
  
           // play our sound
           sound->Play();
  
           // note:
           // since we're NOT holding the pointer to the
           // sound created here, the stop callback must be
           // set to free the sounds after playing.
           // this allows the AudioManager to recycle sound objects.
           handled = true;
        } break;
  
     case osgGA::GUIEventAdapter::KEY_F1:
        {
           mLabel->SetActive(!mLabel->GetActive());
        } break;
  
     default:
        {
           // play our one sound.
           // if it's currently playing, this
           // call will have no effect.
           mSound->Play();
           handled = true;
        } break;
     }
  
     return handled;
  }