Updating itunes library
The following instructions apply to the Sonos Desktop Controller App for Mac or PC.
Before you begin, make sure you download the Sonos Desktop Controller App for Mac or PC and install it on the computer that contains your music library files.
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If you have used an external program to change data and you don’t want to have to play each song to get it to update then this post will show you how.i Tunes will then re-add all the files you already have to you library. Rather, it will re-scan each file and will alter the metadata for the existing entries in your library.
All the music in your personal i Tunes library — no matter where it came from — lives right alongside the Apple Music catalog.
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Add your music from up to 16 different computers in a matter of minutes.