The perfect weather for field recording tonight. The air is still and it is cold, sounds travel much further and echo more, the time means most of the traffic noise and human activity isn't present. Possibly the best time to gauge the qualities of a public space. It is possible to hear the hard surfaces all around - distant sounds from garbage removal trucks and the occaisional car from the Passage de Colon make their way into the square, echo off the building facades and dissipate into the night. I think about making an IR recording, in Barcelona if might be possible to get away with a loud twelve second swept sinewave at 3 in the morning? Could definitely get away with popping a balloon with a multichannel mic in the square...