Audio decoding and encoding now available

[John-K]

You had good intuition with the GeneralPlus angle, the projector uses their A1800 codec, or possibly the "event" variant of it (would make sense given the lightshow and such). I haven't looked at G+ Eventor yet, but that would be a logical next step

With the help of Claude Opus 4.6, we have implemented an encoder and decoder for it in Rust by reverse engineering its windows DLL.

It's available here

If you aren't setup to deal with Rust projects, just let me know and I can post a command line binary that does the encoding / decoding.

[mtkimmins]

🫨 So excited!

GainSec was actually the person who pinpointed the generalplus lead. He is quite smart.

Conversely, I am not yet familiar with Rust, but I will dig into it.

[John-K]

I have also posted a python wheel for it, so you can just pip install a1800_codec but you would have to have rust installed for it to build itself - I'll try and upload some wheels for it tonight as well so Rust wouldn't be required

Edit: The build system I packaged can self-bootstrap, so pip install will be enough, no Rust install needed

[mtkimmins]

With much handholding from copilot, I have successfully used your codec and decoded Region 1 from Big Shark Little Shark Baby Shark. It produced the literal audio from the first frame!
I gotta learn Rust to really understand this, this is amazing!