Having started this thread, I should now report that all my streamers are now working with the Google Assistant. Other than a reset, which resulted in a partial resolution, I’m not sure how this happened. And I still have one issue for which I have a viable workaround.
But I’m a happy camper.
(Now to focus on the sound quality . . .) 
My muso still doesn’t work with Google. I can rename it and google assistant see the new name, but i still cant ask google to play music on it. This latest firmware sucks
I tried reset the muso and many other things 
When you open Google Home is your Muso listed at the bottom as a Local device? Like my Nova in the screenshot.
Fortunately, that no longer happens for me.
yes and when i add it to a room its just offline. I can chromecast to it just fine, but asking google to play on it doesnt work. I feel like i just have a huge bricked speaker now and i havent used it for weeks. When i have time i will give it 1 last try to fix it, otherwise i will buy another product that works. All my nest, home speakers also works fine.
Hi @itmanuk,
Sorry, I don’t really get your point as I’m not native speaker.
I having a chromecast problem with my second-hand bought Muso 2. It’s not discoverable by any means. I reseted it many time and the firmware still 4.4.0 (6575).
I have the same issue (turn on Chromecast built-in but it will turn off shortly, Mu-so 2 Chromecast is not discoverable) Could you please share with me how to solve it?
On the other hand, you also said that Google Chromecast device works for you. Which generation of GG Chromecast do you use? I have a GG Chromecast 2nd genration (HD one), but it doesn’t work. No sound comes out via the HDMI port.
Hello there
My Muso QB 2 Google Cast firmware is 1.56.310669
I would make sure your Google Home app is the latest version.
I was successful in adding my device by tapping on the + and selecting ‘Google Nest or Partner device’
If you are unable to turn on Chromecast input in the Naim & Focal app settings then you won’t get very far.
I wish I could tell you what I did to fix it, but the fact is I don’t know. After a while the problem just went away, first for my ND5 XS2 and a week or so later for my Nova. (I have a different, ongoing problem with my Muso, for which I have found a workaround,) This could be the result of a fix by Google. They claimed their tech support was working on the problem, but I never received a communication from them that it was fixed. I got nothing from Naim and they closed my ticket.
A few thoughts:
Try these steps:
You could also delete and reinstall the Google Home app. Or at least be sure you’re running the latest version.
Especially the removal from the Muso in Google Home is essential. Whenever I had problems with Chromecast, that’s what my first action always was.
For some reason the handshake doesn’t always work after an update (from either side, Naim or Google).
After removal try adding a new device, and hopefully then it will see the Muso again.
So follow the steps that @jegreenwood stated.
