This project is the simplest way I could think of to display the contents of an ARA document. The goal would be to draw a timeline of all the active ARA instances. Audio transformations will be minimal, just enough to demonstrate save/restore, undo/redo, and the function of the AudioModification object.
After cloning don't forget the classic git submodule update --init --recursive to get the juce and ARA SDK submodules.
After adding a new file you should run regenSource.py to update the SourceFiles.cmake which is important to the CmakeLists.txt
Then you can run scripts/rebuild_all.sh to build the vst3 / au / test objects
You need to be online for the cmakelists to work currently (to grab catch2) -- Sorry!
Do what you want with this and leverage ARA for all the good things in the world.