A scanline moves across the moving image and the pixel values drive banks of tuned oscillators. Signal values are used to drive brightness/contrast/saturation parameters on the video feed. Effect chains on the oscillator banks are likewise altered by the parameters of the sound, which feeds back into the video.
guts
abstract a/v by eightprime
Shapes in Space
by composer Sabina Covarrubias
Further South
built around music from the Alexandrian composer Latefall