I finally managed to finish a project where I could combine most of the tools I love and use. I created a processing sketch to visualize the stereo correlation of my song "Magical Dreams", exported the frames and used blender to create an animated highfield based on the brightness of the images. Then I rendered these frames and combined them to a video with the original track exported from bitwig.
Hmmm ... maybe a bit more complicated than needed, but that's one of advantage of a hobby project - you don't have to justify yourself for inefficient processes and toy around as long as you want to :-)
Animation Node experiment - Music nodes
processing sound visualizer
new Song: Still Awake