Know what a metronome is? It’s a nasty little torture device for musicians whose sole purpose, besides helping you keep exact time, is to make a hole in your skull and leave a burning scar in your subconsciousness, rendering your brain utterly useless. As this guy put it, “when you spend 48 hours in one weekend in the studio and you hear this click, you have dreams about it in the end.’ Well, okay, we don’t hate metronomes that much, they’re…