I've had a look on the internet in an attempt to find out what's going on here, but I'm too old and it's too confusing with all sorts of unfamiliar terms, such as electronic metal. In my day, metal was a portly lad in a denim jacket with Judas Priest written on the back in biro in slightly wonky old English lettering, and usually spelt wrong - Judas Preast or whatever. Should you attempt to engage him in a conversation about electronic metal he'd probably decide you were gay, thus ensuring your never being able to enjoy a drink in the White Bear ever again, at least not without some of it being poured over your head by random bikers you don't even know but who've heard all about the local bum bandit.
Anyway, metal has thankfully moved on, and now sounds a bit like some of Nocturnal Emissions darker works of the nineties, which is fine by me. Bliss Signal present walls of guitar decay tempered with that machine gun bass pedal thing - blast beats, according to the man on the internet; beyond which I'm left trying to describe this thing without invoking either cathedrals of sound or collapsing black holes. It's huge, and is suggestive of vast things happening a long way away, yet all coming together to somehow form a symphony much like that aircraft formed by a hurricane blowing through a scrapyard so beloved of creationists who don't understand stuff.
Electronic metal is probably as good a description as any, if you really need one, and it's not as annoying as dark ambient. Bliss Signal is better though, a hint towards something celestial, and a cause of fear only because it otherwise defies description. Jolly good.