@Jan_Koudijs I think you’re the most likely person to know how to do this.
Is there any way I can have the audio through a zone/output as a js stream that I could play out of a webpage hosted form the extension?
The Roon API is for the control plane only. It shows data about the music that is playing and lets you do some playback control. There a volume, queue, and zone management features.
The data plane which carries the audio is not exposed through the Roon API. So, no streaming to a web client…
How comfortable are you with coding?
I have managed to do what you want to do, although output to Audirvana instead of to webstream.
There are quite a few steps to set it up and it is vey rigid that every little change in Roon will break it.
I’m pretty comfortable. JS isn’t my strong point but with a little guidance I’ll definitely give it a go.