public SoundTestSystem(IWorld world, ISoundSystem soundSystem, IInputManager inputManager) : base(world, world.EntityFilter(10).With <SoundClipComponent>())
{
_keyboard = inputManager.Keyboard;
_sound = Map <SoundClipComponent>();
_soundEffects = soundSystem.GetPlayer("SoundEffects");
_music = soundSystem.GetPlayer("Music");
_volume = _soundEffects.GetVolume();
}