Filmed a train. Took the video output of said train and ran it into the audio inputs on my modular synthesizer. By doing this, you get an audio signal that fluctuates in pitch corresponding to changes in brightness from the image. This fluctuating pitch was routed, modulated and filtered in real time into the sound your hear with the video. Similarly, I took the audio output of said train video and ran it into a TV video input, and that is the image you see. Two tracks crossing.