I visited an exhibition of Nam June Paik at MUMOK yesterday and was reminded of some timelapse recordings I did a few years ago.  This particular one is catching the train home from the centre of Flinders Street Station, Melbourne around the loop via Southern Cross Station out to Merri Station at about 11pm on a Tuesday night. It is 12 stops. At every station there are two beeps, one for the doors opening and one for them closing. What i like about these recordings is that they maintain the integrity of the frequency spectrum. I developed a software to record ‘frames’ of sound, as if my sound recorder were a movie camera. I used them as you would use frames in stop motion animation or a time lapse recording. 

My question is - Because of the Doppler effect do we hear sound events or moments as occurring in a shorter period at a higher pitch as if speeding up a tape recording? Or would there actually be both higher and lower pitches as ‘sound generators’ move closer and further away? When we speed up video the image does not get brighter. What if we were to travel fast as light would that mean we see total darkness? What do you see when one car is traveling away from you at the speed of light and one car is traveling towards you at the speed of light. 

hmm.. I am sure this is too much for my weekday mind let alone my Sunday afternoon mind!