JankoPiano - 2014-06-20
This is an early tape of analog video feedback experiments which I created in 1981. Magnavox TV, RCA camera, RCA VHS recorder, mirror. The first VHS recorder released in the USA was in 1977. The feedback is video self-oscillation with screen glare from room lamps or a flashlight as the excitation input. The mirror made possible many interesting symmetries. The system was very unstable and somewhat difficult to control.
Thanks so much for sharing this awesome historical footage!
Great footage! Wondering where the mirror is positioned in the system? Thanks for posting!
The mirror was laid nearly horizontally and nearly perpendicular to the screen, but these were adjusted slightly in the process. By rotating the camera relative to the screen and mirror, symmetry could be changed from 3 to 4 to 5 fold and everything between and beyond.
Awesome!
How’d you get the swirling at 24:24 ?
Just different settings of camera rotations relative to the monitor, zoom and color controls. These interact with the transfer functions of the camera sensor and the screen phosphors over which there is no control. There is a mirror at a near right angle to the screen which produces the tesselated patterns.
JankoPiano what camera were you using?
@synthmalicious an RCA. It looked like this: http://kitschnsyncprops.com/projects/images/IMG_0050.JPG
Alex Trott - 2019-10-28
love it. what would i need to buy to try this out?