We should get the easy stuff out of the way first. No-one, apart from singer Mark Greaney, knows what the group's name means and he's getting a little annoyed about all the silly theories that journalists keep putting to him ("Janis Joplin's weight in stones at the time of her demise?" "a German plane?"). JJ72 is creating a sound of such verve and intensity that it makes the trio's peers sound like rank amateurs.