I am currently using Poweramp alpha-build-709-play on my Xiaomi Mi A1 Android Oreo, and I found an interesting problem in the spectrum style visualization preset. (Preset: spectrum-narrow)
1. The visualization didn't show or react when the right side channel audio is playing, the visualization only react to left side audio channel. The visualization show nothing when it playing the right side channel.
This is the left side channel, the visualization show normally
And this is right side channel, the visualization didn't show anything.
2. The visualization not sensitive enough to react the quiet audio file even though we still can hear the sounds.