Needs audio pass-thru – Gravitarium Live - Music Visualizer + Review

This is a fun app but it's not very useful without audio pass-thru from another audio player running on the iPhone such as Spotify. iTunes library is nice but there are a handful of other audio players that need to have the ability to background play while this is running. Hope to see that in a future update!
Review by PolloTec on Gravitarium Live - Music Visualizer +.