This just started happening to me, my Sonos won’t update my music library. If i delete my music folder and re-add it will be have everything in there that should be, but if i add more music (mp3s, which i do almost daily) and have it update, none of the additions show up.
my music’s on a macbook running big sur 11.6
Check how many tracks are in your library. A Sonos music library has a 65,000 track limit. The limit can be reached by either track count or by memory usage. The memory limit can be reached prior to 65,000 tracks if there is a large amount of metadata. For example, classical music tracks tend to have a large amount of metadata and can use up the available memory before the 65,000 track limit is reached.
Also make sure your MP3 file sample rate is 48kHz or lower and the bitrate is 320kbps or lower.
You might also try rebooting your MacBook, deleting and re-installing the Sonos app, and rebooting your router.
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