Hi! I like what you're doing here. I'm the author of a tool that utilises an opus encoder and decoder in the browser to emulate something like modern live streaming. I followed similar ideas to yours but ultimately found that the icecast route was a little bit limited. If you're interested, the code is here: https://github.com/gaxge and is in the process of being refactored/ updated. You can play around with the original prototype here: https://low.show/noisecrypt/app. I use the streaming tools mainly for doing stuff with jamming in combination with randomness but they can be repurposed for normal linear real-time streaming.

I'm also based in Germany, and you're welcome to reach out if you want to talk about this kind of stuff further.