Sorry, just realized it is from one of the beta forums, which has limited access. My apologies.

It talked about the change to incorporate both overall volume change along expression change nodes on a track. It was implemented in RealBand 2016 (your version) as I understand, so that's the first version to have it.

The sad part is that I find no reference to the nodes feature and how to use it at all in the RealBand 2019 user manual.

LaptopBeast HP Win10Pro64 8GB
AudioBeast ASUS Win10Pro64 16GB
VideoBeast HP Win10Pro64 8GB

BB-RB2020/UMC404HD/Casio Kbds/Cakewalk/Reaper/Studio One/Samplitude/MixBus/Notion/Finale/Noteworthy/NIKomplete/Halion/Garritan/IK