You can hide the media control bar of the screen by "Swipe Down" gesture.
Related article: Usage guide
Unfortunately, your device does not able to capture sound. It's device specific limitation and there is no known workaround.
Related article: Limitations on Nexus 4, 5, and 7 (2013)
Visualization does not work on some of the Samsung Galaxy series phones. It's device specific issue.
Recommended workaround: Please use Snoop mode with Poweramp.
Related article: Limitations on Galaxy S3, S4 and Note 3 (Snapdragon Quad core model)
Step 1: Show hidden "Developer options" menu
Step 2: Disable "NuPlayer"
It's device specific issue. Please try the following workaround.
It's device specific issue. The reverb effect is not properly implemented on many devices. Unfortunately, there is no known workaround.
Yes. Music Visualizer supports Scrobbling via official Last.fm app or Simple Last.fm Scrobbler app.
Yes. Music Visualizer provides Tasker plugin. You can install it from Settings ❯ Misc. ❯ Tasker plugin for Music Visualizer.
Music Visualizer provides "Alternative Image" function.
Your home app may not support the feature. Please try to use another home apps.