Hate to break it to you, Sherlock, but science has proven that music does in fact create sound, thus creating noise.
Also hate to break it to you, but death metal/melodic death metal is some of the most complicated modern music to create. The guitar work has to be top notch, and it takes a lot of talent to do good growling/screaming vocals. You try screaming/growling out lyrics without it flying all over the place with no control. Can you? Doubt it. Growl/scream singing requires a lot of talent to pull off.