Thanks for IRadio flac responses. I should have remembered previous topics.
Things went well. The MuSo Gen 1 firmware was updated and all went well. The previous time, pre-pandemic, the MuSo update crashed and had to switch off/switch on/switch off/switch on several times before the MuSo was eventually recovered. The MuSo sounded impressive.
The Focal/Naim app was installed/updated on a recent Lenovo Yoga Android tablet (Android 10). The app appeared sluggish but eventually worked. Strangely an older Acer tablet running on Android 7 worked much quicker on the Focal/Naim app. The Focal/Naim app would not work on an IPad as it required IOS v13 (Naim bad mark for compatibility) when the Android Acer is probably older.
Installed AssetUPnP R7.4 Windows) to replace Servio on the Windows PC with external hard disc holding the media library. AssetUPnP worked flawlessly as expected.
The Focal/Naim app kept losing the “Room” i.e. the MuSo. The Muso is on wired ethernet so the problem appears to be the usual recurring app problem. As an alternative using BubbleUPnP the Muso connection was consistently stable again indicating the App is the issue not the MuSo.
The new Focal/Naim app design seemed crass as the initial screens are unnecessary and why you cannot link to existing Naim devices directly as practically all users will want to do.
The Iradio did not present flac stations (as previously reported) but this is not stated in the Naim MuSo Gen 1 Manual!!!
I did not find the app intuitive particularly navigating the trees for both Asset and IRadio. Locating the IRadio “All Stations” and searching for new stations seemed messy.
Could not see how to access the play Queue and an option to directly play a whole album would be helpful. I am used to a “PlayAlbum” button.
Examining the App settings I found “MultiRoom” was set on. Why, how, new default - I don’t know as there was no multiroom. Turning it off seemed to improve things!
Tried to use playlist from Asset with external radio stations using http and https URLs. These stations consisted of mp3, flac and hi-res flac. They all played for 2 seconds then stopped. These work OK on a Denon streamer from Asset using BubbleUPnP (and also work on Linn Kazoo) so needs to be followed up with Naim. See topic Naim streamers will not play playlists with http and https URLs - Streaming Audio - Naim Audio - Community (Update - Naim have now confirmed this does not work on the Mu-So gen 1 but is supported on recent devices.)
Overall the exercise was a success and my colleague has an updated “nas” with Asset that plays well on the MuSo. The regular lost “Room” app issue was and remains the major problem.