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If it's a busy market street. A lot of traffic, small cars and mopeds, rickshaws both pulled by motor bike or horses, lots of people.
Harmonium in the background. We had a lot of street vendor stuff (check your region/language). There are horns constantly and we found that we had take a heap out because they would drive the audience nuts. Agree with the crows as well - we had an interior dialogue where a crow got into the building, it took forever to edit it out. I went back and watched Slumdog Millionaire. Have a look at The Waiting City