My Sonos music library is my iMac music library (mostly my own CDs I've ripped and music I've purchased and downloaded from iTunes store). When I add artists or albums to my iMac music library, my Sonos library updates next time I click ‘Update Music Library’. So far so good.
But why can't it do the reverse? When I delete artists from my Imac music library they don't delete from my Sonos music library. How is this even possible? and how can I persuade my Sonos system to delete the tracks and artists I’ve already deleted from my iMac?