I set this up last night and the drum track did seem to be ducking the bass or mildly compressing it. I tried several compressors with similar results and adjustments.
The thing that I noticed was the effect seemed to be happening while looking at the graphs and graphic representations, but what I actually heard didn't seem especially different. Maybe it was my chosen combination or bass and drum tracks? Not sure. But even after adjusting several different aspects of the compressors I could not seem to get anything that jumped out at me where I said," wow, this is really better".
I also noticed that my SPAN plug-in is side chainable and attempted to route to it. The routing seemed to work but when I clicked on the plug I didn't see the signal coming into SPAN.
In the Sonitus compressor the audio button can be changed to side chain, but when I engaged it nothing happened. I guess I'm still not entirely familiar with it.
Are the results of side chaining usually this discrete? As in I can hardly tell there is a difference.