I’m wondering if there are any solutions to add distributed audio to existing speakers. I remember that Google used to sell an audio-only Chromecast with 3.5mm out. I think they got into a pissing match with Sonos and lost so they killed it. Is there something else I can look at to add audio to my existing bookshelf speakers and sound bars? Is there a cost-effective audio extractor of I wanted to just use some video Chromecast or something?
The video Chromecast do multiroom audio, so if you have a soundbar with HDMI input that might work, or a surround receiver.