“One of the sounds I associate most with Lisbon (where my mother was born), is the eerie polyphony of the Ponte 25 de abril. The red suspension bridge across the river Tejo hums and howls as cars and trucks drive over its metallic grating. Now and then, trains join in from the lower deck. This recording was made around midnight, right underneath the bridge on the north bank. 

(recorded in stereo AB with two omni’s from Immersive Soundscapes)”