Self made KWGT,
My first android themes related post on reddit. It's so, I don't even remember (or understand) how I get the formula to layout the text. The oldness also shown from the font used. I just pick Roboto Condensed as it's my favorite out of the default text.
Yap, it's based on album art. I aso remember the glow-ish thing behind it are based on the text, i pick some letters of it then blur it to the max.