I don't think you have to look at it as "evil." Really....what does the general sound "look" like to you. A dark night, a storm, a cold moor, something like that? To me it does.....and there's nothing evil about those things. They're dark, but still beautiful. From a Christian perspective....God created all of those things, so there's nothing evil about them at all. That doesn't mean the music you would write to personify a storm would be happy sounding.