I'm a bit confused - this doesn't look like a quick tool built to solve one issue - this links to what appears to be a whole company with many sophisticated products. You did this all yourself?
Wow I didn't expect this to get so much attention.
Yes, I built all these products.
The tools have a shared C++ core library and then I did the DAW integrations and platform-specific GUIs with JUCE, which is a cross platform C++ toolkit popular with audio people.
The original issue that I solved was simply mixing a large number of inputs down to something like 22.2 cinema surround based on mathematical formulas. Instead of the user dialing in 24 knobs, they type in XYZ coordinates and the math decides those 24 knobs for you.
Later versions then added animation, control surfaces, the headphone surround sound, and MPEG-H export for live TV.
All the initial release versions were 1 programmer x 3 years. By now, I've moved on and nowadays they have a small team to do maintenance, support, upgrades, etc.
Back then, people used it for live art performances, so I added a protocol to stream in the positions real-time. The ARRI mixing desks have the same protocol, so capturing motion data into your DAW is definitely doable.