The King's Troop Royal Horse Artillery fire off gun salutes on various occasions in London's Royal Parks. Today was Queen Elizabeth II's official birthday and I popped down to Hyde Park with the TetraMic to grab a few gun-shots. Unfortunately, there were rather more security people than usual around and I was moved from place to place until I was right in front of the guns at a distant of about sixty feet. This is not good as the pressure wave effectively records as a DC pulse and comes out as a click. There are six cannons and the last two produce sounds that are just about usable. In this recording, I've taken six of the furthest gunshots and joined them together, with a quick-ish fade at the end. But be warned, there's a LOT of LF in this recording.