Jukebox Plug-In
I have been gone for a while but like any good AttractMode, I keep getting pulled back in! This really is the best front-end. I built a new cabinet that sort of has a 1:1 aspect display and there was really nothing else flexible enough to work. I used AM and it turned out fantastic.
Anyhow, I resurrected my old DisplayMusic plugin for the project, cleaned it up and simplified it and now it's just Jukebox. You specify a main music folder, and you can fill it with as many or as few subfolders of music files as you want. In the options, you need to edit the "Jukebox Mode" config option to correspond with the subfolders you set up. Then you also choose whether you want your music to continue playing over the top of your screensaver or not. Then tweak the volume settings to your taste (the Jukebox plays as ambient sound), so if you have snapvids with sound they are playing at a desirable level relative to the music.
The only thing I didn't add (or figure out) is how to make it so you could select a "Jukebox Mode" (i.e., a music subfolder) from the UI itself. If anyone has suggestions I could try to implement that. But for now, you can only configure this from the Plugins menu.