...
private float _musicVolume;    
public float musicVolume {
   get {
      return _musicVolume;
   }
   set {
      _musicVolume = value;
      if (music1Source != null) {    
         music1Source.volume = _musicVolume;
      }
   }
}
...
public bool musicMute {
   get {
      if (music1Source != null) {
         return music1Source.mute;
      }
      return false;        
   }
   set {
      if (music1Source != null) {
         music1Source.mute = value;
      }
   }
}

public void Startup(NetworkService service) { 
   Debug.Log("Uruchomienie menedżera dźwięku...");

   _network = service;

   music1Source.ignoreListenerVolume = true;  
   music1Source.ignoreListenerPause = true;  

   soundVolume = 1f;
   musicVolume = 1f;

   status = ManagerStatus.Started;
}
...
