Do you have documentation or any blog post on your setup? Lsat I tried snapcast, it worked, but eventually had too much lag between nodes. And there is no UI bundled by default, so I was wondering what the most mature frontend would be.
1: https://radusuciu.com/posts/wireless-vinyl/ 2: https://github.com/badaix/snapweb 3: https://github.com/badaix/snapcast#contributions