True to spooky-voiced form, [a]The Knife[/a]’s Karin has recorded a deeply unsettling solo track for a charity compilation to benefit victims of the Japanese tsunami. It features her obliquely going “ooh-ooh” for five minutes, like a melancholy ghost who’s just trodden on an upturned plug. Bleak. But what did you expect, a rowdy cover of ‘Whoomp! There It Is’?