I have a large Sonos install in my home with 17 total speakers:
-Four bedrooms, each with two Play:1’s as stereo pairs
-Three common rooms, each with two Play:5’s as stereo pairs, each with a Sub
-one speaker is wired, to create a SonosNet/Boost mode network
So in total, I have:
-8 Play:1 speakers
-6 Play:5 speakers
I play FLAC files from either an Android phone, a local NAS hosted library or through Plex from a local NAS hosted library. I also stream from SiriusXM
Playing FLAC in one or two rooms grouped together works fine. Going beyond that results in random speakers dropping out, pauses, skips, advancing to the next song. I can group all rooms together and stream from SiriusXM without issue.
I’ve been working through the issues with Sonos Tech Support, to limited success thus far. I added a Boost on their recommendation, altered WiFi settings, changed SonosNet and WiFi channels, wired 2 additional speakers, removed the powerline network (that wasn’t used by any of the wired speakers) and removed nodes from the Asus AiMesh WiFi network. So far, none of the recommendations have improved multi-room playback all that much. I will continue to work with Sonos Tech Support.
This leads to the obvious question; has anybody been able to play FLAC files across more than a handful of grouped speakers? If so, I would appreciate some insight into your setup. I’m starting to think that Sonos cannot handle the high bitrate of FLAC files across large numbers of speakers. This is disappointing as my 10 year plus old Squeezebox setup handled FLAC over a similar configuration without issue over 802.11g WiFi.