If it's a music project named 'dead sound based on true story', it could be that the artist was inspired by a true story to create a particular sound or set of sounds. The 'dead sound' might represent a feeling of emptiness, loss, or finality that was derived from the events of the true story. It could be that the music is trying to convey the emotions and experiences related to that story through unique sonic elements, like using certain instruments or sound effects to recreate the mood of the true events.
Well, if 'dead sound based on true story' is a movie, perhaps it's about some real - life events that are related to a disturbing or eerie sound that has some sort of significance in the story. It might involve a mystery or a horror - type scenario where the true story aspect adds an extra layer of authenticity and intrigue. Maybe it's about a haunted place where people hear this 'dead sound' and the movie explores what's really behind it based on the real events that took place there.
I'm not entirely sure specifically which 'dead sound based on true story' you're referring to. It could be a movie, a music album, or some other form of media. Without more context, it's hard to say exactly what it's about.