Depression manifests itself in many ways. Whether diagnosed or not it is a very real and debilitating disease that is nearly impossible to accurately describe to those who are unafflicted. Fortunately there is one outlet that humans have used for thousands of years that portrays these types of intangible emotions: art.
There are plenty of ways to make noise. We have come to accept this from the overwhelming canonization of metal, which has given way to a plethora of sub-genres spanning from funeral doom to goregrind. Yes, it is surprising, perhaps even ironic, that such highly distorted cacophonies can be so multi-tiered.