Technique: A bike handlebar mounted mounted webcam is processed by a laptop, creating a time lapse where the exposures overlap (no movement is lost). The audio comes from pitch-shifting recordings from a large solenoid (modified bass speaker) which were capturing most low-frequency vibrations. More here: rpi.edu/~mcdonk/AmbientLapse/ I went to and returned from Radioshack, around 23 minutes away, and composited the return path in reverse using overlay mode. Going and returning are panned slightly left and right, respectively.

I added some mass to the bass speaker, effectively introducing a low-pass filter. I wanted to use the bike like a record needle, and play the street and sidewalks.