Visualizations of "Trap Nation" "NCS" "Monstercat" and so on are drawn in a video editor like After Effects. And in fact, they do not quite work in terms of frequencies.
Most of the mildrop visualizations just work on the "bass" "mid" "treb" frequencies, but it's more pleasant for our eye to see an inaccurate picture of the sound like on YouTube.
In Winamp itself, the visualization is more lively. The Android code conversion process is to blame here. Which is not 100% compatible.