This app was mentioned in 6 comments, with an average of 1.00 upvote
Setup/
Launcher - Nova Launcher
Icon - CaelusWhite
Widget - KWGT ( Sun & Sea and Mini-ism Pack)
Wallpaper - Got it from Pinterest ( edited with snapseed )
Visualizer widget - https://play.google.com/store/apps/details?id=com.georgie.musicvu
I found some a while back and the FPS was really bad, and battery use too. Would not recommend.
however:
https://play.google.com/store/apps/details?id=com.georgie.musicvu&hl=en_GB
Got no such thing. It's a VU meter i use wavelet. Same as v4a no root. But. For your asking. https://play.google.com/store/apps/details?id=com.georgie.musicvu
Audio Visualizer: https://play.google.com/store/apps/details?id=com.georgie.musicvu
Music Player: https://play.google.com/store/apps/details?id=com.widgets.music
Launcher: https://play.google.com/store/apps/details?id=com.teslacoilsw.launcher
Icon Pack: https://play.google.com/store/apps/details?id=com.whicons.iconpack
Clock: https://play.google.com/store/apps/details?id=com.motorola.timeweatherwidget
Wallpapers: https://pin.it/4JKeGda https://pin.it/4W2y3kA
EXTRA
Wallpaper changes every 10 minutes. Wallpaper Changer: https://play.google.com/store/apps/details?id=de.j4velin.wallpaperChanger
This is the one I use as a widget. It is picky about which music app you use though. https://play.google.com/store/apps/details?id=com.georgie.musicvu
Real-time audio vu meter with a homescreen widget available. Currently using Music VU and it's the closest I've found ... but not perfect.
And if I can dream ... I'd like both a horizontal and a vertical widget display. Thank you very much!
EDIT - reason it's "not perfect" - it seems to lag behind actual audio being played. Makes me wonder if it's just RNG actually.