Parallel worlds: Millennium Bridge deep drone and atmosphere

The Milenium Bridge has long been known for its musical drones. The steel wires that prevent you from falling into the river sing when it's windy. It is not audible with normal ears but can be heard by touching the side of your head to the hand rail and listening to the sounds inside. Over the years several soundart pieces in the nearby Tate Gallery have revealed and exploited the sound. Contact microphones will pick up the sound. This track uses both normal and contact microphones and crossfades between them, from the outside to the parallel sonic world inside. Peoples footsteps, wheeled cases and push chairs also resonate the metal of the bridge.