Moog Synthesizer Images

The colorized abstractions of Moog Synthesizer Images were created by feeding Moog synthesizer oscillators into the video inputs of a television monitor. The oscillators were locked into the horizontal and vertical frequencies: thin lines of electronic “pencils” responsible for drawing the video image side-to-side and up and down. By slightly altering the frequencies of the oscillators, different images are formed. Thus, the images directly correlate to sound and are controlled by sound.

“In a TV tube (CRT), the horizontal and vertical frequencies controlled the speed at which the electron beam scanned across the screen, essentially determining how quickly the image was drawn line by line, with the horizontal frequency dictating the speed of the beam across each line and the vertical frequency dictating how often the beam returned to the top of the screen to start drawing a new line, creating a complete picture on the screen.” -AI generated explanation of how a cathode ray tube TV created an image

“This is perhaps video’s most synaesthetic (sic) imagery, for as the sound determines and shapes the picture, the viewer experiences a transmutation of senses; sound is ‘seen’.” 
-Carol Zemel, Artscanada’s “Issue of Video Art” (October 1973)