A local blogger (Bob Mackin) in Vancouver writes about U2's current rehearsals: "The rehearsals at the home of the Western Hockey League's Vancouver Giants are under tight security and secrecy. The glass doors at the main south entrance of the arena are obscured by interior black curtains and part of the north parking lot is closed. Initially, the Pacific National Exhibition wouldn't even confirm the tenant was U2. The sounds emanating from the afternoon and evening sessions are unmistakably U2. On April 21, I happened by during multiple takes of "Raised By Wolves"... Read more.
Here's a clip of Bob Mackin's recording of U2's "Raised by Wolves" during their live soundcheck in Vancouver on Tuesday: