[caption id="" align="alignnone" width="600" caption="image by Google maps"][/caption] As an experiment, this past weekend I brought an omni-directional microphone with me during a walk through the Byward Market and Rideau Centre. Starting beside the Highlander at the foot of the William Street Mall, I walked along seeing what sounds might leave a strong enough "audio footprint" to identify when I played the file back. In the first segment I managed to pick out the sounds of Karen Carpenter thumping the life out of a tinny speaker outside a candy store, then the tuneless plucking ...