Welcome to the latest episode of Londonist Out Loud, a podcast about London.
This week, N Quentin Woolf goes deep into the bowels of Tower Bridge to meet Iain Chambers, who's using the sounds of the bridge to create sweet music as part of the Totally Thames festival.
Please do let us know your thoughts via Twitter @londonistsound and @londonist or in the comments.
Londonist Out Loud is presented and produced by N Quentin Woolf.
Photo by Steve Stills.
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