He meant ARA2.
It's a brand new product so it definitely uses the state of the art in ARA2.
It has only been tested and certified in Studio One 7.2.3 > Studio Pro 8.
This is primarily due to its integrated into the Effects Browser of the DAW.
It is an integrated process of dragging from the browser tab to the arrangement in the song. Also, for a DAW to be compatible it has to support ARA2 and a chord track.
The VST3 plugin version is complete stand alone process.


Studio One (latest version), Win 11 23H2 , i9 -10940X 3.3 GHz, 32GB Mem, a 4K 40" monitor, PreSonus Studio Live III Console as interface/controller. secondarily test on Reaper, Cakewalk, and S1 on Surface Pro 3 Win 10 (latest versions).