Having been a long-time user of a Beomaster/Beosound 5, I have meticulously ripped all my music to WMA lossless over the years using WMP. Using strict nonclementure/taxonomy and imbedding hi-res album art for each album has made the BS5 a breeze and a pleasure to use.
As a precaution to a BM5 HDD failure, I backed all my music and ripped video to a WD Cloud 4tb drive. Its not the best storage in the world but I was pretty impressed the other day when setting up my new Avant how effortlessly the BV connected to the drive and the speed it can queue and play both DVD and Music.
Because the WMA files are embedded with album art, the Avant can display this information automatically:-