Twittering of swallows, that fly around in the early morning in Rua Sá da Bandeira in Porto. In the background some traffic noise, cars passing, buses waiting with running engine at the nearby bus station. Also audible is a high pitched humming or whistling, perhaps from some bus or air conditioning system. Round 0:50 car parking next to the microphone, people getting out, doors slamming.Recorded with Roland Edirol R-09 digital recorder and Edirol CS-15 cardioid-type stereo microphone.
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