Touchdesigner and the Double Vision System

Hello, this will be my first post, excited to be here. I have tried looking through the forum to see if there is any other discussion involving the use of Touch designer(TD).
I have recently acquired the Double Vision System(DV) after some odd years of waiting for a Chromagnon.

In the meantime I have tinkered with TD. The general idea I have is to input a live TD project to the DV, and then Output from the DV back into the computer with some sort of capture card and maybe create some cool feedback loop back into TD. I have bought a few converters and they do not seem to output from the PC to the DV as well as not being able to output from the DV to an Elgato stream link I’ve had lying around. Looking into some more hardware options such as the V4 for effects or the V4ex. Maybe a Blackmagic Mini Capture device. So many options seem to present themselves.

I have an old Surface laptop that I can output via a mini displayport adaptor to HDMI with a converter that does output to an SDI signal that works but the port seems to be a bit janky and it makes like the bottom of the screen appear at the top with a nice fat line in between. Kinda cool but annoying. And the laptop isn’t my desktop which is what I would like to use for the ability to run TD.

Any advice on a next step would be helpful so I don’t end up throwing more money at converters that don’t upscale or downscale correctly.

Welcome to the forum.
The TD feedback loop should be a lot of fun, once you get it patched up.
One popular and reliable series of converters is made by BlackMagic Design. You could use HDMI to SDI and SDI to Analog mini converters to get the video into Double Vision (without the pesky line, hopefully). For output, you would use mini converters with the opposite flow: Analog to SDI and SDI to HDMI (with an HDMI to USB dongle at the end). You shouldn’t need to scale up or down, as DV can accept and send analog HD video.
I recommend searching the forum for capture solutions. There are many good options out there.

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