As mentioned in the Terminal Interface section of the Studio Scripting Reference, you can send data to Studio via TCP/IP over port 3663, which will be interpreted as Javascript encoded in UTF8. This will give you access to all the normal console commands - a “Hello World” command should be as simple as sending console.log("Hello World").
If you render or modify assets in your assets directory, FMOD Studio should automatically detect changes and update accordingly, though some files may need to be refreshed/imported. Additionally, we have a Reaper integration, which will allow you to link your Reaper project and its renders to your FMOD Studio project, and export Reaper timelines to events.