The Xbox Music App (build 18.104.22.168) is showing the Album Art for only about 1% of my music collection. The other 99% of the Albums are shown with the default blank Album cover. See http://sdrv.ms/1ckGuar
The Music Collection is held on a WHS 2011 system (so it is properly indexed, and the index shared with the Xbox Music App). Each Album is held in a separate folder; all the tracks for an Album have the Album Art contained in an ID tag, and each folder also has the Album Art contained in a separate folder.jpg file.
If I use the Xbox Music App to open an Album folder, then it will display the Album art contained in the individual files (see http://sdrv.ms/17RLTyj ), but it doesn't display Album Art in the main collection view.
Windows Media Player and Windows Media Center are both able to construct and display the Album Art from the tags and folder.jpg files, but the Xbox Music App seems unable to do so.
I do not have the "retrieve metadata and Album Art from the internet" switched on, simply because the quality of the metadata from the Microsoft online service is abysmal, and full of errors. I learnt that lesson back in the days of Windows Media Player and Windows Media Center. Both WMP and WMC are able to construct and display the Album Art from the tags and folder.jpg files, but the Xbox Music App seems unable to do so.
Is there some way to force the Xbox Music App to read the Album Art from the tags or the folder.jpg files?
Update: I think that the Album Art image files are held in the folder:C:\Users\Username\AppData\Local\Packages\Microsoft.ZuneMusic_8wekyb3d8bbwe\LocalState\ImageCache\20
Interestingly, the majority (99%) of the files in there are of the form: <long string>_badrequest, with file size of 0 kB.