DISCRET 11

DISCRET 11: Video encryption from 1984

The circuit is based on the pirate decoder from Radio Plans magazine, 1984. This decoder permitted to watch TV shows from a quite famous French TV channel without paying, with the help of some specific ICs and some reflexion. It was based on two video delay line, a sync signal extractor and also a delayed/nondelayed line detection circuit.The original encryption working by delaying lines of the picture pseudo-randomly (with fixed delay times), Radio plan circuit was checking if the line was delayed or not, and with the 2 onboard delays, realign the lines of the picture to make it viewable. A Wikipedia page about this encryption is available (in French).

Discret11 keeps the delays, and also a quite similar sync extraction circuit as the one from the above schematic,however, the goal is to encrypt instead of decrypt, so the line detecting circuitry isn’t used. It’s replaced by frequency dividers, which divide the line frequency in subdivision, so the delayed picture appear every 2, 4, 8 lines, selectable using two rotary switches. The occurency of delayed lines can be set to random (with a circuit based on Random Gate from Yves Usson/Yusynth), in an attempt to reproduce the original encryption (a pseudo-random sequence of a length of 6 frames). The delay times, fixed on the base circuit, can be modified using potentiometers, which will delay the whole line but will also affect color the line (as the phase of the chrominance signal is delayed with the rest of the signal). A wipe between original, non delayed, signal and the delayed signal has been added. Two potentiometers adds glitch effects, with a switch to turn them off.

The project is now available assembled through the webshop.

DOCUMENTATION

User Guide
Build guide
BOM
Schematics

Enclosure

Mouser BOM (does not include screws for enclosure)

#discret11 sur Instagram

Luma keying is a good way to constrain effects to certain parts of the source image.  Here, Détail pre-filter output is connected to Seuils which generates hard keys out of it, with each channel of Seuils controlling each of the parameters of Détail.  Recorded in Composite NTSC 480i59.94.  Let me know in the comments if there is any module combinations you’re curious about! 
#analogvideo #videoart #eurorack #analogglitch #glitchart #syntonie #syntoniedetail #syntonieseuils
#magnavox #videoequations #discret11 #crttv
Long time no sync!  Past month has been quite busy, been working on setting up a fixed video recording setup (finally), and here is the first recording made with it! (Need to work on the lighting still).  The now classic Détail and CBV001 combo, with CBV001 used to process the modulation going to Détail. Getting the best of CBV001 distorsion without worrying about loss of sync as Détail preserves it.  Recorded in Composite PAL 576i50.  Stock of Détail and CBV001 are low, so might be the right time to grab one!  #analogvideo #videoart #eurorack #analogglitch #glitchart #syntonie #cbv001 #syntoniedetail
Results of recording tv static sent though old school circuit bent video processing things, plus a device from France based on their tv scrambling in the late ‘80’s. #static #crttv #glitchvideo #circuitbending #analogvideo #discret11 #syntonie
Je viens faire du visuel pour l’Algorave samedi 24 mai à Grrrnd Zero, organisé par @ordinateurdanslatete 
J’aurai pas d’ordi, bien que le synthétiseur modulaire est une sorte d’ordinateur analogique? 🤔  18h->06h
Prix conseillé +-8 euros
Grrrnd Zero
60 avenue de Bohlen
69120 Vaulx-en-Velin
Cash Only / Food and Merch  Line up :  c_robo_ afalfl gcode azertype bleuje neon_delice maeertt nesso bruno_gola dok kaamtar ungual marlen 2mo fronssons plot three_naugthi_bois syntonie lucky.juj jaxa nabir sara_adkins th4 bubobubobubo ralt144mi crash_server polymorphic_engine parvagues libre_&change_trio z0rg peregrine lbvp emilie_breslavetz
“Noise 0” full visual on website 
touchdesigner + discret 11 circuit.
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Track: "Minotauro" from Acid Myths [SLC38]  by Langax
From BandCamp, CC BY-NC-SA 3.0
soisloscerdos.bandcamp.com
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 #glitch #glitchart #glitchartist #visualart #visualartist #newmedia #glitchartistscollective #newaesthetic #lofi #digitalart #trippy #lsd #acid #drugs #art #experimental #digital #trippy #generativeart #inspire #artwork #syntonie #discret11
holographic_thought_process explaining his DISCRET11 to draincain and I, was way too awesome. #discret11 #crt #glitchartistcollective #holographicthroughprocess #longuestgacartistname #bluex80 #exhibition #paris #france #art #glitch #glitched #analog #analogglitch #sheglitchr #draincain
Made with Détail, Stable and CBV001. Digging the variety of looks such a system can achieve.
Recorded in Composite PAL 576i50  #videoart #glitchart #analogglitch #analogvideo #analogprocessing #eurorack #syntoniedetail #syntoniestable #syntonieCBV001 #syntonie
Finally got my biz together and messed about calibrating the htp.syntonie #discret11 box..!!
⚡️👾⚡️
So here’s a #glitch #cyberman busycircuits 😎 #videoglitch #videosynth #synthdiy #crt
#Repost holographic_thought_process ・・・
#glitch #glitchart #glitchartidtcollective #analogvideo #circuitbending #discret11
Experimenting with RaspPi through new #Discret11 by holographic_thought_process at #livecinemalab spektrum_berlin … wicked machine!
Building a proof-of-concept RPi frame sampler w. cyberboy666 ! Records ~30 seconds NTSE 24bit video when GPU split is set to 128MB - with some additional #discret11 for effect. Code up on http://github.com/autr/rpi-frame-sampler #raspberrypi #openframeworks #videocircuits #videosynth
Discret11 CV test. Slightly better quality available on my YT channel. Process:
Discret11 glitch effect is modulated by a sample and hold, this same sample and hold is also sent to a pitch quantizer to play the synth.
#discret11 #glitch #glitchart #glitchartistcollective #DIY #circuitbending #syntonie