> There are many commercial solutions out there that provide functionality similar to balenaSound. Most of them though come with a premium price tag and are riddled with privacy concerns.

The problem that I have with proprietary solutions isn't the privacy or the cost. It is that there is a high probability that they will be unsupported in a couple of years.

I have been looking for a way to have whole-home audio, preferably over IP but it doesn't seem like there is a polished, open solution.