This is designed for your environment, to help remove the stuck lower vibrational energies from around the place you are (where ever you play it).
It excites the ambient vibration around you then propagates it, so there is an continuous added effect (in the area it affects)
I think it is important, that your environment also remains 'clean'.
We all do not have the luxury if we are on a spiritual path to find a cave to live in or remote mountains, where we can keep away from the conflicting energetic states around us.
So this provides a mean by which you can easily keep your surroundings clean, or maybe there was an argument or even criminal activities and you want to get rid of that ominous energies and emotions.
Use as much as you need.